使用 Ubuntu 安裝郵件伺服器 (Mail Server)：Postfix + Dovecot + Openwebmail
Posted by ken on September 12th, 2010
在 DNS Server 的文章提到二個域名 (domain name)：
www.example.com.tw
mail.example.com.tw
這篇文章的內容與 mail.example.com.tw 有關；至於 www.example.com.tw 上一篇已經說明。
架設郵件伺服器 (mail server) 需要 Postfix 和 Dovecot 二個套件。
Postfix 負責 SMTP
Dovecot 負責 POP3 和 IMAP
選擇 Dovecot 的理由是 Dovecot 同時支援 Maildir 和 mbox；而 Openwebmail 只支援 mbox。
Ubuntu Server 從 9.10 版開始提供一支套件 Dovecot-postfix，這支套件整合了 Postfix 與 Dovecot 的設定環境，使設定更簡單。
環境
我們希望郵件伺服器 Outlook Express 可以收發郵件，同時也提供網頁郵件服務。以下是我們的假設環境：
郵件伺服器：Postfix
POP3 伺服器：Dovecot-pop3d
IMAP 伺服器：Dovecot-imapd
信箱格式：mbox
認證：使用 Ubuntu Server 的帳號及密碼
網頁郵件服務：Openwebmail
Postfix
Ubuntu Server 常用的郵件伺服器是 Postfix。
安裝
安裝 Postfix 的指令如下：
sudo apt-get install postfix
安裝過程中，畫面會要求你設定你的環境。
Internet Site
example.com.tw
啟動停止 Postfix 的指令如下：
sudo /etc/init.d/postfix start #啟動 Postfix
sudo /etc/init.d/postfix stop #停止 Postfix
sudo /etc/init.d/postfix restart #重新啟動 Postfix
組態
後面我們要安裝 dovecot-postfix 套件，安裝 dovecot-postfix 會修改 Postfix 的 main.cf 檔案，這裡的 main.cf 檔案是被 dovecot-postfix 更改後的檔案。
Postfix 主要的組態設定檔是 /etc/postfix/main.cf。vi 編輯 main.cf 的指令如下：
sudo vi /etc/postfix/main.cf
main.cf 的內容如下：
第 9行 將 (Ubuntu) 拿掉
第21行到第25行 #註記
第34行 新增 mail.example.com.tw
第41行 #註記，因為這裡使用 mbox
第54行 #註記
第56行到第61行 #註記
# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
#smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem
#smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key
#smtpd_use_tls = yes
#smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
#smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = dns.example.com.tw
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = mail.example.com.tw, example.com.tw, dns.example.com.tw, localhost.example.com.tw, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

#home_mailbox = Maildir/

smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_authenticated_header = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes

smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sender_restrictions = reject_unknown_sender_domain

#mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-dovecot-postfix.conf -n -m "${EXTENSION}"

#smtp_use_tls = yes
#smtpd_tls_received_header = yes
#smtpd_tls_mandatory_protocols = SSLv3, TLSv1
#smtpd_tls_mandatory_ciphers = medium
#smtpd_tls_auth_only = yes
#tls_random_source = dev:/dev/urandom
重新啟動 Postfix。
Dovecot
Ubuntu Server 常用的 POP3 Server, IMAP Server 是 dovecot。
安裝
安裝 Dovecot POP3, IMAP Server 的指令如下：
sudo apt-get install dovecot-pop3d dovecot-imapd
安裝 dovecot-postfix 的指令如下：
sudo apt-get install dovecot-postfix
啟動停止 Dovecot 的指令如下：
sudo /etc/init.d/dovecot start #啟動 Dovecot
sudo /etc/init.d/dovecot stop #停止 Dovecot
sudo /etc/init.d/dovecot restart #重新啟動 Dovecot
組態
安裝 dovecot-postfix 後，/etc/dovecot 目錄的 dovecot.conf 被 # 註記了。新的組態檔的位置在：
Ubuntu Server 9.10 在 /etc/dovecot 目錄裡，多了 dovecot-postfix.conf 檔案。
Ubuntu server 10.04 LTS 在 /etc/dovecot/conf.d 目錄裡，多了 01-dovecot-postfix.conf 檔案。
編輯組態檔案的指令如下：
sudo vi /etc/dovecot/dovecot-postfix.conf # Ubuntu Server 9.10
# or
sudo vi /etc/dovecot/conf.d/01-dovecot-postfix.conf # Ubuntu Server 10.04 LTS
dovecot-postfix.conf 或 01-dovecot-postfix.conf 檔案內容如下：
第 2行 將 imaps pop3s managesieve 用 # 註記
第 3行 disable_plaintext_auth = no，使用 Ubuntu 帳號、密碼
第 4行 ssl = no，不使用 SSL 認證
第 5行到第 7行 #註記，不使用 SSL 認證
第 8行 mail_location = maildir:~/Maildir #註記，不使用 Maildir
第 9行 新增 mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u # (for mbox)，使用 mbox
# Some general options
protocols = imap pop3 # imaps pop3s managesieve
disable_plaintext_auth = no
ssl = no
#ssl_cert_file = /etc/ssl/certs/ssl-mail.pem
#ssl_key_file = /etc/ssl/private/ssl-mail.key
#ssl_cipher_list = ALL:!LOW:!SSLv2:ALL:!aNULL:!ADH:!eNULL:!EXP:RC4+RSA:+HIGH:+MEDIUM
#mail_location = maildir:~/Maildir
mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u # (for mbox)
auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@

# IMAP configuration
protocol imap {
mail_max_userip_connections = 10
imap_client_workarounds = outlook-idle delay-newmail
}

# POP3 configuration
protocol pop3 {
mail_max_userip_connections = 10
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
}

# LDA configuration
protocol lda {
postmaster_address = postmaster
mail_plugins = sieve
quota_full_tempfail = yes
deliver_log_format = msgid=%m: %$
rejection_reason = Your message to <%t> was automatically rejected:%n%r
}

# Plugins configuration
plugin {
sieve=~/.dovecot.sieve
sieve_dir=~/sieve
}
重新啟動 Dovecot。
測試
測試 SMTP port 25，輸入下列指令
sudo telnet mail.example.com.tw 25
Postfix 回應顯示如下：
Trying 192.168.0.10...
Connected to dns.example.com.tw.
Escape character is '^]'.
220 dns.example.com.tw ESMTP Postfix
接著輸入下列指令
ehlo mail.example.com.tw
Postfix 回應顯示如下：
第 5行 250-AUTH PLAIN LOGIN
第 6行 250-AUTH=PLAIN LOGIN
250-dns.example.com.tw
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
完成收發信的認證設定。
Openwebmail
網頁郵件套件我們選擇 Openwebmail。
Ubuntu 沒有提供 Openwebmail 套件，B2D 中文 Linux 計劃1有提供。
修改 /etc/apt/sources.list
sudo vi /etc/apt/sources.list
在 sources.list 檔案最後面加入以下這行
deb ftp://debian.tnc.edu.tw/pub1 b2d/
Ubuntu Server 10.04 LTS 比較麻煩，套件庫裡的 libmd5-perl 有問題，無法直接安裝。手動安裝 libmd5-perl 的指令如下：
第 1行 下載 libmd5-perl_2.03-1_all.deb 套件。
第 2行 安裝 libmd5-perl_2.03-1_all.deb 套件。
sudo wget http://mirrors.kernel.org/ubuntu/pool/universe/libm/libmd5-perl/libmd5-perl_2.03-1_all.deb
sudo dpkg -i libmd5-perl_2.03-1_all.deb
安裝
安裝 Openwebmail 的指令如下：
sudo apt-get update
sudo apt-get install openwebmail
安裝後不要忘記將 /etc/apt/sources.list 檔案裡新增的 deb ftp://debian.tnc.edu.tw/pub1 b2d/ 註記起來。
# deb ftp://debian.tnc.edu.tw/pub1 b2d/
更新 auth_unix.pl
B2D 版本已經是很舊的版本 (2006/10/20 以前的版本，但不包括 1020 版)，因為當時尚未改成支援 blowfish，所以必須下載 auth_unix.pl，把它拷貝到 /usr/lib/cgi-bin/openwebmail/auth，覆蓋掉原有的 auth_unix.pl，否則將無法正常登入 Openwebmail。會出現下面的錯誤訊息。
--------------------------------------------------------------------------------------------------------------
Can't locate Crypt/Eksblowfish/Bcrypt.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl /usr/lib/cgi-bin/openwebmail) at /usr/lib/cgi-bin/openwebmail/auth/auth_unix.pl line 15.
BEGIN failed--compilation aborted at /usr/lib/cgi-bin/openwebmail/auth/auth_unix.pl line 15.
--------------------------------------------------------------------------------------------------------------
下載 auth_unix.pl 指令如下：
sudo wget ftp://ftp3.tnc.edu.tw/b2d/openwebmail/auth_unix.pl
覆蓋掉原有的 auth_unix.pl 指令如下：
sudo cp auth_unix.pl /usr/lib/cgi-bin/openwebmail/auth/
組態
登入 Openwebmail 前，先修改 openwebmail.conf 檔案，編輯 openwebmail.conf 指令如下：
sudo vi /usr/lib/cgi-bin/openwebmail/etc/openwebmail.conf
openwebmail.conf 檔案內容如下：
第13行 設定域名，這裡是 example.com.tw
第15行 病毒檢查
第16行 垃圾郵件檢查
第17行 垃圾郵件學習
第18行 網頁硬碟服務
第19行 終端機功能
第21行 郵件語系
第22行 ICON 設定
第25行到第29行 郵件簽名
#
# Open WebMail configuration file
#
# This file contains just the overrides from defaults/openwebmail.conf,
# please make all changes to this file.
#
# This file sets options for all domains and all users.
# To set options on per domain basis, please put them in sites.conf/domainname
# To set options on per user basis, please put them in users.conf/username
#
# Please refer to openwebmail.conf.help for the description of each option
#
domainnames example.com.tw

enable_viruscheck yes
enable_spamcheck yes
enable_learnspam yes
enable_webdisk yes
enable_sshterm no

default_locale zh_TW.Big5
default_iconset Cool3D.Chinese.Traditional
default_fscharset none

<default_signature>
--
Open WebMail Project (http://openwebmail.org)

</default_signature>
記得在修改 openwebmail.conf 之後，別忘了執行
sudo /usr/lib/cgi-bin/openwebmail/openwebmail-tool.pl --init
登入 Openwebmail
開啟瀏覽器，網址列輸入
http://192.168.0.10/openwebmail
使用者第一次登入帳戶要設定基本資料。
1. http://b2d.tnc.edu.tw/

About Postfix
Postfix is a free, open source Mail Transfer Agent which works to route and deliver email.


Prerequisites
Before installing Postfix, you will need to have a Fully Qualified Domain Name pointing to the server that you will be using.

You can find instructions on that here:How to Set Up a Host Name with DigitalOcean

Install Postfix
Postfix can easily be installed through apt-get:

sudo apt-get install postfix
During the installation, you will see a dialogue box appear, asking you which kind of installation you would prefer. Select “Internet Site”.

Follow up by entering the name of your domain.

Once Postfix is installed there are a few steps that need to be taken before it is fully functional.

Configure Postfix
Once Postfix is installed, go ahead and open the main configuration file.

sudo nano /etc/postfix/main.cf
There are a few changes that should be made in this file.

myhostname = example.com
Put in name of your domain into myhostname.

If you want to have mail forwarded to other domains, replace alias_maps with virtual_alias_maps and point it to /etc/postfix/virtual.

virtual_alias_maps = hash:/etc/postfix/virtual
The rest of the entries are described below

mydestination defines the domains that postfix is going to serve, in this case—localhost and your domain (eg. example.com). relayhost can be left, as is the default, empty.

mynetworks defines who can use the mail server. This should be set to local—creating an open mail server is asking for SPAM. This will usually have damaging effects on your server and may put you in line for discipline from your web hosting provider.

If it is not set up by default, as it should be, make sure you have the following text on that line:

mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
The rest of the lines are set by default. Save, exit, and reload the configuration file to put your changes into effect:

sudo /etc/init.d/postfix reload
Configure Additional Emails
To redirect emails to specific emails, you can add users to the alias file. By default each user on the server will be able to read emails directed to their username@domain-name.com.

Open up the the alias database:

sudo nano /etc/postfix/virtual
Within that file, enter in the names of your users. For example:

sales@example.com username1
me@example.com username2
Once you are finished, save, exit, and run the following command:

postmap /etc/postfix/virtual
The last step is to reload postfix once more.

sudo /etc/init.d/postfix reload
Conclusion
Once Postfix is installed, mail can be sent to and from the server, although without a mail server like Dovecot or Cyrus, you will only be able to see the email on the server.

You send out email from the command line with the command “sendmail” and where you want the mail sent to:

sendmail sample-email@example.org
Once you enter the command, type your message, and when it is completed, you can send it off with ctrl-D

Incoming mail gets delivered into /var/mail/username

Dovecot 套件提供 pop3 / pop3s / imap / imaps 服務。
Sendmail 收信寄信服務
sasl2-bin 提供認證服務

環境: Ubuntu 7.04 Server

1.安裝 dovecot 套件

sudo apt-get install dovecot-common dovecot-pop3d

2.設定 /etc/dovecot/dovecot.conf

protocols = pop3
disable_plaintext_auth = no
ssl_disable = yes

3.啟動 dovecot

/etc/init.d/dovecot start

4.測試

telnet pop3_server 110
auth
user user_name
pass user_password

若出現 OK 表示成功。

1.安裝 Sendmail 服務

sudo apt-get install sendmail

2.設定 Relay IP

/etc/mail/access
192.168.1.1 RELAY

允許 192.168.1.1 IP 透過 Sendmail 發信
3.設定收信 Domain

/etc/mail/local-host-names
ssh.tw
mail.ssh.tw

將收 ssh.tw / mail.ssh.tw 網域的信件
4.設定 Sendmail listen address

/etc/mail/sendmail.cf
O DaemonPortOptions=Port=smtp,Addr=0.0.0.0, Name=MTA

5.啟動 Sendmail 服務

/etc/init.d/sendmail start

若中間有改過 /etc/mail 內的值，可以執行 make 更新資料。

1.下載 OpenWebmail
2.解壓 openwebmail.tar.gz

tar xvzf openwebmail.tar.gz -C /var/www

3.修改 openwebmail.conf

domainnames ssh.tw
mailspooldir /var/mail
ow_cgidir /var/www/cgi-bin/openwebmail
ow_cgiurl /cgi-bin/openwebmail
ow_htmldir /var/www/data/openwebmail
ow_htmlurl /openwebmail
default_iconset Cool3D.Chinese.Traditional

4.修改 etc/auth_unix.conf
passwdfile_encrypted /etc/shadow
passwdmkdb none
5.執行初始安裝
openwebmail-tool.pl –init

Ubuntu smtp验证配置
===========================================================
作者: yeahokay(http://yeahokay.itpub.net)
发表于: 2008.04.08 17:25
分类: linux（Ubuntu）
出处: http://yeahokay.itpub.net/post/11939/459273
---------------------------------------------------------------
在配置sendmail 的smpt验证时，碰到了不少麻烦事，最后总算搞定了。有时只是一些简单的操作，却是因为没有文档，导致配置工作的进展困难。这里记录下一些配置过程中忽略的小事情。

sudo apt-get install sendmail(其中已经包含了sendmail-bin)

sudo apt-get install sasl2-bin

配置主要集中在sendmail.mc文件。

a)将MTA-v4的监听地址去掉，这样就可以监听所有地址。修改后如下：

dnl DAEMON_OPTIONS(`Family=inet6, Name=MTA-v6, Port=smtp, Addr=::1')dnl
DAEMON_OPTIONS(`Family=inet, Name=MTA-v4, Port=smtp')dnl
dnl DAEMON_OPTIONS(`Family=inet6, Name=MSP-v6, Port=submission,Addr=::1')dnl
DAEMON_OPTIONS(`Family=inet, Name=MSP-v4, Port=submission')dnl

b)添加验证参数如下：

TRUST_AUTH_MECH(`DIGEST-MD5 LOGIN PLAIN')
define(`confAUTH_MECHANISMS',`DIGEST-MD5 LOGIN PLAIN')

直接添加到上面MTA的配置底下即可。

c)修改访问配置。使用了smtp验证后，就可以忽略access的配置。所以要将/etc/mail/access里面的配置内容清空。如果不清空，会出现不使用smpt验证也可以发送邮件的情况。

所有修改完毕后使用sendmailconfig命令，一路选择缺省即可。最后这个命令会reload sendmail。

4.验证安装和配置

启动sendmail后，telnet localhost 25，在出现的控制台，输入命令ehlo localhost

注意：localhost主要还是看/etc/hosts文件，一般（具体就不清楚，就我的机器是localhost：127.0.0.1，而具体做 mail服务的是ubuntu：192.168.20.6）是打上Aliases名称，如打上IP Address就是不认。


查看输出信息：

250-ENHANCEDSTATUSCODES
250-PIPELINING
250-EXPN
250-VERB
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH DIGEST-MD5 LOGIN PLAIN
250-DELIVERBY
250 HELP

如果出现上面红色的字，表明已经可以了。

5.验证邮件发送。

配置好smtp验证后，在本地域的邮件发送还是可以不通过smtp验证直接发送。要验证smtp是否配置成功，必须发送到域外的邮箱如gmail邮箱。

一些容易碰到的问题：

1)sendmail配置好后，从别的机器telnet 25端口，连接被拒绝。

原因：这是由于缺省sendmail绑定到127.0.0.1的25端口，所以从别的机器telnet 192.168.0.230 25 并不能访问25端口。

解决：搜索sendmail.mc文件，将其中的

DAEMON_OPTIONS(`Family=inet, Name=MTA-v4, Port=smtp', Addr=127.0.0.1)dnl

修改为

DAEMON_OPTIONS(`Family=inet, Name=MTA-v4, Port=smtp', Addr=0.0.0.0)dnl

或者 DAEMON_OPTIONS(`Family=inet, Name=MTA-v4, Port=smtp')dnl

2)看到250-AUTH DIGEST-MD5 LOGIN PLAIN的标志，却还是不能使用smtp验证发送邮件

原因：可能未安装sasl2

解决办法：安装sasl2

sudo apt-get install sasl2-bin

安装完成后，在文件/etc/default/saslauthd文件中，找到START=no，修改为START=yes

修改完后/etc/init.d/saslauthd start

3)配置好后，可以使用smtp验证发送邮件，不使用smtp验证也能够发送邮件

原因：发送和接收邮件在域内，如果发送的邮件地址不在域内，则可能是 /etc/mail/access文件未清空。

解决：将 /etc/mail/access文件清空。

要注意的一点：

修改任何配置，需要重新启动sendmail，建议使用命令 sendmailconfig启动。

#
# Copyright (c) 1998-2005 Richard Nelson. All Rights Reserved.
#
# This file is used to configure Sendmail for use with Debian systems.
#
#
# Copyright (c) 1998-2004 Sendmail, Inc. and its suppliers.
# All rights reserved.
# Copyright (c) 1983, 1995 Eric P. Allman. All rights reserved.
# Copyright (c) 1988, 1993
# The Regents of the University of California. All rights reserved.
#
# By using this file, you agree to the terms and conditions set
# forth in the LICENSE file which can be found at the top level of
# the sendmail distribution.
#
#

######################################################################
######################################################################
#####
##### SENDMAIL CONFIGURATION FILE
#####
##### built by root@fluxtek.com on 六 3月 20 15:40:05 HKT 2010
##### in /root
##### using /usr/share/sendmail/cf/ as configuration include directory
#####
######################################################################
#####
##### DO NOT EDIT THIS FILE! Only edit the source .mc file.
#####
######################################################################
######################################################################

##### $Id: cfhead.m4,v 8.116 2004/01/28 22:02:22 ca Exp $ #####
##### $Id: cf.m4,v 8.32 1999/02/07 07:26:14 gshapiro Exp $ #####
##### $Id: sendmail.mc, v 8.14.3-6 2008-12-06 22:15:17 cowboy Exp $ #####
##### $Id: autoconf.m4, v 8.14.3-6 2008-12-06 22:15:17 cowboy Exp $ #####
##### $Id: debian.m4, v 8.14.3-6 2008-12-06 22:15:17 cowboy Exp $ #####
#
#-------------------------------------------------------------------------
#
# Undocumented features are available in Debian Sendmail 8.14.3-6.
# * none
#
# _FFR_ features are available in Debian Sendmail 8.14.3-6.
# * milter
# * -D_FFR_QUEUE_SCHED_DBG -D_FFR_SKIP_DOMAINS -D_FFR_GROUPREADABLEAUTHINFOFILE -D_FFR_DAEMON_NETUNIX -D_FFR_NO_PIPE -D_FFR_SHM_STATUS -D_FFR_RHS -D_FFR_MAIL_MACRO -D_FFR_QUEUEDELAY=1 -D_FFR_BADRCPT_SHUTDOWN -D_FFR_RESET_MACRO_GLOBALS -D_FFR_TLS_1 -D_FFR_DEAL_WITH_ERROR_SSL
#-------------------------------------------------------------------------
#
# These _FFR_ features are for sendmail.mc processing
#

#-------------------------------------------------------------------------
##### $Id: debian-mta.m4, v 8.14.3-6 2008-12-06 22:15:17 cowboy Exp $ #####


##### $Id: no_default_msa.m4,v 8.2 2001/02/14 05:03:22 gshapiro Exp $ #####

##### $Id: use_cw_file.m4,v 8.11 2001/08/26 20:58:57 gshapiro Exp $ #####


##### $Id: access_db.m4,v 8.27 2006/07/06 21:10:10 ca Exp $ #####

##### $Id: greet_pause.m4,v 1.4 2004/07/06 20:49:51 ca Exp $ #####

##### $Id: delay_checks.m4,v 8.8 2000/12/05 18:50:45 ca Exp $ #####

##### $Id: conncontrol.m4,v 1.4 2004/02/19 21:31:47 ca Exp $ #####


##### $Id: ratecontrol.m4,v 1.5 2004/02/19 21:31:47 ca Exp $ #####



##### $Id: proto.m4,v 8.734 2008/01/24 23:42:01 ca Exp $ #####

# level 10 config file format
V10/Berkeley

# override file safeties - setting this option compromises system security,
# addressing the actual file configuration problem is preferred
# need to set this before any file actions are encountered in the cf file
O DontBlameSendmail= ,AssumeSafeChown,ForwardFileInGroupWritableDirPath,GroupWritableForwardFileSafe,GroupWritableIncludeFileSafe,IncludeFileInGroupWritableDirPath,DontWarnForwardFileInUnsafeDirPath,TrustStickyBit,NonRootSafeAddr,GroupWritableIncludeFile,GroupReadableaDefaultAuthInfoFile

# default LDAP map specification
# need to set this now before any LDAP maps are defined
#O LDAPDefaultSpec=-h localhost

##################
# local info #
##################

# my LDAP cluster
# need to set this before any LDAP lookups are done (including classes)
#D{sendmailMTACluster}$m

Cwlocalhost
# file containing names of hosts for which we receive email
Fw/etc/mail/local-host-names %[^\#]

# my official domain name
# ... define this only if sendmail cannot automatically determine your domain
#Dj$w.Foo.COM

# host/domain names ending with a token in class P are canonical
CP.

# "Smart" relay host (may be null)
DS


# operators that cannot be in local usernames (i.e., network indicators)
CO @ % !

# a class with just dot (for identifying canonical names)
C..

# a class with just a left bracket (for identifying domain literals)
C[[

# access_db acceptance class
C{Accept}OK RELAY


# Resolve map (to check if a host exists in check_mail)
Kresolve host -a<OKR> -T<TEMP>
C{ResOk}OKR


# Hosts for which relaying is permitted ($=R)
FR-o /etc/mail/relay-domains %[^\#]

# arithmetic map
Karith arith
# macro storage map
Kmacro macro
# possible values for TLS_connection in access map
C{Tls}VERIFY ENCR





# dequoting map
Kdequote dequote

# class E: names that should be exposed as from this host, even if we masquerade
# class L: names that should be delivered locally, even if we have a relay
# class M: domains that should be converted to $M
# class N: domains that should not be converted to $M
#CL root



# my name for error messages
DnMAILER-DAEMON


# Access list database (for spam stomping)
Kaccess hash -T<TMPF> /etc/mail/access

# Configuration version number
DZ8.14.3/Debian-6


###############
# Options #
###############

# strip message body to 7 bits on input?
O SevenBitInput=False

# 8-bit data handling
#O EightBitMode=pass8

# wait for alias file rebuild (default units: minutes)
O AliasWait=10

# location of alias file
O AliasFile=/etc/mail/aliases

# minimum number of free blocks on filesystem
O MinFreeBlocks=100

# maximum message size
#O MaxMessageSize=0

# substitution for space (blank) characters
O BlankSub=.

# avoid connecting to "expensive" mailers on initial submission?
O HoldExpensive=False

# checkpoint queue runs after every N successful deliveries
#O CheckpointInterval=10

# default delivery mode
O DeliveryMode=background

# error message header/file
#O ErrorHeader=/etc/mail/error-header

# error mode
#O ErrorMode=print

# save Unix-style "From_" lines at top of header?
#O SaveFromLine=False

# queue file mode (qf files)
O QueueFileMode=0640

# temporary file mode
O TempFileMode=0640

# match recipients against GECOS field?
#O MatchGECOS=False

# maximum hop count
O MaxHopCount=100

# location of help file
O HelpFile=/etc/mail/helpfile

# ignore dots as terminators in incoming messages?
#O IgnoreDots=False

# name resolver options
O ResolverOptions=+WorkAroundBrokenAAAA

# deliver MIME-encapsulated error messages?
O SendMimeErrors=True

# Forward file search path
O ForwardPath=$z/.forward.$w:$z/.forward

# open connection cache size
O ConnectionCacheSize=2

# open connection cache timeout
O ConnectionCacheTimeout=5m

# persistent host status directory
#O HostStatusDirectory=.hoststat

# single thread deliveries (requires HostStatusDirectory)?
#O SingleThreadDelivery=False

# use Errors-To: header?
O UseErrorsTo=False

# log level
O LogLevel=9

# send to me too, even in an alias expansion?
O MeToo=True

# verify RHS in newaliases?
O CheckAliases=False

# default messages to old style headers if no special punctuation?
O OldStyleHeaders=True

# SMTP daemon options
O DaemonPortOptions=Name=MTA

# SMTP client options
#O ClientPortOptions=Family=inet, Address=0.0.0.0

# Modifiers to define {daemon_flags} for direct submissions
#O DirectSubmissionModifiers

# Use as mail submission program? See sendmail/SECURITY
#O UseMSP

# privacy flags
O PrivacyOptions=needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings

# who (if anyone) should get extra copies of error messages
#O PostmasterCopy=Postmaster

# slope of queue-only function
#O QueueFactor=600000

# limit on number of concurrent queue runners
#O MaxQueueChildren

# maximum number of queue-runners per queue-grouping with multiple queues
O MaxRunnersPerQueue=5

# priority of queue runners (nice(3))
#O NiceQueueRun

# shall we sort the queue by hostname first?
#O QueueSortOrder=priority

# minimum time in queue before retry
#O MinQueueAge=30m

# how many jobs can you process in the queue?
#O MaxQueueRunSize=0

# perform initial split of envelope without checking MX records
#O FastSplit=1

# queue directory
O QueueDirectory=/var/spool/mqueue

# key for shared memory; 0 to turn off, -1 to auto-select
#O SharedMemoryKey=0

# file to store auto-selected key for shared memory (SharedMemoryKey = -1)
#O SharedMemoryKeyFile

# timeouts (many of these)
#O Timeout.initial=5m
#O Timeout.connect=5m
#O Timeout.aconnect=0s
O Timeout.iconnect=2m
#O Timeout.helo=5m
O Timeout.mail=2m
#O Timeout.rcpt=1h
O Timeout.datainit=2m
#O Timeout.datablock=1h
#O Timeout.datafinal=1h
O Timeout.rset=1m
O Timeout.quit=2m
#O Timeout.misc=2m
O Timeout.command=5m
O Timeout.ident=5s
#O Timeout.fileopen=60s
#O Timeout.control=2m
O Timeout.queuereturn=5d
#O Timeout.queuereturn.normal=5d
#O Timeout.queuereturn.urgent=2d
#O Timeout.queuereturn.non-urgent=7d
#O Timeout.queuereturn.dsn=5d
O Timeout.queuewarn=4h
#O Timeout.queuewarn.normal=4h
#O Timeout.queuewarn.urgent=1h
#O Timeout.queuewarn.non-urgent=12h
#O Timeout.queuewarn.dsn=4h
#O Timeout.hoststatus=30m
#O Timeout.resolver.retrans=5s
#O Timeout.resolver.retrans.first=5s
#O Timeout.resolver.retrans.normal=5s
#O Timeout.resolver.retry=4
#O Timeout.resolver.retry.first=4
#O Timeout.resolver.retry.normal=4
#O Timeout.lhlo=2m
#O Timeout.auth=10m
#O Timeout.starttls=1h

# time for DeliverBy; extension disabled if less than 0
#O DeliverByMin=0

# should we not prune routes in route-addr syntax addresses?
#O DontPruneRoutes=False

# queue up everything before forking?
O SuperSafe=True

# status file
O StatusFile=/var/lib/sendmail/sendmail.st

# time zone handling:
# if undefined, use system default
# if defined but null, use TZ envariable passed in
# if defined and non-null, use that info
#O TimeZoneSpec=

# default UID (can be username or userid:groupid)
O DefaultUser=mail:mail

# list of locations of user database file (null means no lookup)
#O UserDatabaseSpec=/etc/mail/userdb

# fallback MX host
#O FallbackMXhost=fall.back.host.net

# fallback smart host
#O FallbackSmartHost=fall.back.host.net

# if we are the best MX host for a site, try it directly instead of config err
#O TryNullMXList=False

# load average at which we just queue messages
#O QueueLA=8

# load average at which we refuse connections
#O RefuseLA=12

# log interval when refusing connections for this long
#O RejectLogInterval=3h

# load average at which we delay connections; 0 means no limit
#O DelayLA=0

# maximum number of children we allow at one time
O MaxDaemonChildren=0

# maximum number of new connections per second
O ConnectionRateThrottle=15

# Width of the window
O ConnectionRateWindowSize=10m

# work recipient factor
#O RecipientFactor=30000

# deliver each queued job in a separate process?
#O ForkEachJob=False

# work class factor
#O ClassFactor=1800

# work time factor
#O RetryFactor=90000

# default character set
#O DefaultCharSet=unknown-8bit

# service switch file (name hardwired on Solaris, Ultrix, OSF/1, others)
#O ServiceSwitchFile=/etc/mail/service.switch

# hosts file (normally /etc/hosts)
#O HostsFile=/etc/hosts

# dialup line delay on connection failure
#O DialDelay=0s

# action to take if there are no recipients in the message
#O NoRecipientAction=none

# chrooted environment for writing to files
O SafeFileEnvironment=/

# are colons OK in addresses?
#O ColonOkInAddr=True

# shall I avoid expanding CNAMEs (violates protocols)?
#O DontExpandCnames=False

# SMTP initial login message (old $e macro)
O SmtpGreetingMessage=$j Sendmail $v/$Z; $b; (No UCE/UBE) $?{client_addr}logging access from: ${client_name}(${client_resolve})-$_$.

# UNIX initial From header format (old $l macro)
O UnixFromLine=From $g $d

# From: lines that have embedded newlines are unwrapped onto one line
#O SingleLineFromHeader=False

# Allow HELO SMTP command that does not include a host name
#O AllowBogusHELO=False

# Characters to be quoted in a full name phrase (@,;:\()[] are automatic)
O MustQuoteChars=.'

# delimiter (operator) characters (old $o macro)
O OperatorChars=.:%@!^/[]+

# shall I avoid calling initgroups(3) because of high NIS costs?
#O DontInitGroups=False

# are group-writable :include: and .forward files (un)trustworthy?
# True (the default) means they are not trustworthy.
#O UnsafeGroupWrites=True


# where do errors that occur when sending errors get sent?
#O DoubleBounceAddress=postmaster

# issue temporary errors (4xy) instead of permanent errors (5xy)?
#O SoftBounce=False

# where to save bounces if all else fails
O DeadLetterDrop=/var/lib/sendmail/dead.letter

# what user id do we assume for the majority of the processing?
#O RunAsUser=sendmail

# maximum number of recipients per SMTP envelope
#O MaxRecipientsPerMessage=0

# limit the rate recipients per SMTP envelope are accepted
# once the threshold number of recipients have been rejected
O BadRcptThrottle=3

# shall we get local names from our installed interfaces?
#O DontProbeInterfaces=False

# Return-Receipt-To: header implies DSN request
O RrtImpliesDsn=False

# override connection address (for testing)
#O ConnectOnlyTo=0.0.0.0

# Trusted user for file ownership and starting the daemon
O TrustedUser=smmta

# Control socket for daemon management
O ControlSocketName=/var/run/sendmail/mta/smcontrol

# Maximum MIME header length to protect MUAs
#O MaxMimeHeaderLength=0/0

# Maximum length of the sum of all headers
#O MaxHeadersLength=32768

# Maximum depth of alias recursion
#O MaxAliasRecursion=10

# location of pid file
O PidFile=/var/run/sendmail/mta/sendmail.pid

# Prefix string for the process title shown on 'ps' listings
O ProcessTitlePrefix=MTA

# Data file (df) memory-buffer file maximum size
#O DataFileBufferSize=4096

# Transcript file (xf) memory-buffer file maximum size
#O XscriptFileBufferSize=4096

# lookup type to find information about local mailboxes
#O MailboxDatabase=pw

# override compile time flag REQUIRES_DIR_FSYNC
#O RequiresDirfsync=true

# list of authentication mechanisms
#O AuthMechanisms=EXTERNAL GSSAPI KERBEROS_V4 DIGEST-MD5 CRAM-MD5
#O DaemonPortOptions=Port=smtp,Addr=0.0.0.0, Name=MTA
# Authentication realm
#O AuthRealm

# default authentication information for outgoing connections
#O DefaultAuthInfo=/etc/mail/default-auth-info

# SMTP AUTH flags
#O AuthOptions

# SMTP AUTH maximum encryption strength
#O AuthMaxBits

# SMTP STARTTLS server options
#O TLSSrvOptions

# Input mail filters
#O InputMailFilters


# CA directory
#O CACertPath
# CA file
#O CACertFile
# Server Cert
#O ServerCertFile
# Server private key
#O ServerKeyFile
# Client Cert
#O ClientCertFile
# Client private key
#O ClientKeyFile
# File containing certificate revocation lists
#O CRLFile
# DHParameters (only required if DSA/DH is used)
#O DHParameters
# Random data source (required for systems without /dev/urandom under OpenSSL)
#O RandFile

# Maximum number of "useless" commands before slowing down
#O MaxNOOPCommands=20

# Name to use for EHLO (defaults to $j)
#O HeloName

############################
# QUEUE GROUP DEFINITIONS #
############################


###########################
# Message precedences #
###########################

Pfirst-class=0
Pspecial-delivery=100
Plist=-30
Pbulk=-60
Pjunk=-100

#####################
# Trusted users #
#####################

# this is equivalent to setting class "t"
#Ft/etc/mail/trusted-users %[^\#]
Troot
Tdaemon
Tuucp

#########################
# Format of headers #
#########################

H?P?Return-Path: <$g>
HReceived: $?sfrom $s $.$?_($?s$|from $.$_)
$.$?{auth_type}(authenticated$?{auth_ssf} bits=${auth_ssf}$.)
$.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
(version=${tls_version} cipher=${cipher} bits=${cipher_bits} verify=${verify})$.$?u
for $u; $|;
$.$b
H?D?Resent-Date: $a
H?D?Date: $a
H?F?Resent-From: $?x$x <$g>$|$g$.
H?F?From: $?x$x <$g>$|$g$.
H?x?Full-Name: $x
# HPosted-Date: $a
# H?l?Received-Date: $b
H?M?Resent-Message-Id: <$t.$i@$j>
H?M?Message-Id: <$t.$i@$j>

#
######################################################################
######################################################################
#####
##### REWRITING RULES
#####
######################################################################
######################################################################

############################################
### Ruleset 3 -- Name Canonicalization ###
############################################
Scanonify=3

# handle null input (translate to <@> special case)
R$@ $@ <@>

# strip group: syntax (not inside angle brackets!) and trailing semicolon
R$* $: $1 <@> mark addresses
R$* < $* > $* <@> $: $1 < $2 > $3 unmark <addr>
R@ $* <@> $: @ $1 unmark @host:...
R$* [ IPv6 : $+ ] <@> $: $1 [ IPv6 : $2 ] unmark IPv6 addr
R$* :: $* <@> $: $1 :: $2 unmark node::addr
R:include: $* <@> $: :include: $1 unmark :include:...
R$* : $* [ $* ] $: $1 : $2 [ $3 ] <@> remark if leading colon
R$* : $* <@> $: $2 strip colon if marked
R$* <@> $: $1 unmark
R$* ; $1 strip trailing semi
R$* < $+ :; > $* $@ $2 :; <@> catch <list:;>
R$* < $* ; > $1 < $2 > bogus bracketed semi

# null input now results from list:; syntax
R$@ $@ :; <@>

# strip angle brackets -- note RFC733 heuristic to get innermost item
R$* $: < $1 > housekeeping <>
R$+ < $* > < $2 > strip excess on left
R< $* > $+ < $1 > strip excess on right
R<> $@ < @ > MAIL FROM:<> case
R< $+ > $: $1 remove housekeeping <>

# strip route address <@a,@b,@c:user@d> -> <user@d>
R@ $+ , $+ $2
R@ [ $* ] : $+ $2
R@ $+ : $+ $2

# find focus for list syntax
R $+ : $* ; @ $+ $@ $>Canonify2 $1 : $2 ; < @ $3 > list syntax
R $+ : $* ; $@ $1 : $2; list syntax

# find focus for @ syntax addresses
R$+ @ $+ $: $1 < @ $2 > focus on domain
R$+ < $+ @ $+ > $1 $2 < @ $3 > move gaze right
R$+ < @ $+ > $@ $>Canonify2 $1 < @ $2 > already canonical


# convert old-style addresses to a domain-based address
R$- ! $+ $@ $>Canonify2 $2 < @ $1 .UUCP > resolve uucp names
R$+ . $- ! $+ $@ $>Canonify2 $3 < @ $1 . $2 > domain uucps
R$+ ! $+ $@ $>Canonify2 $2 < @ $1 .UUCP > uucp subdomains

# if we have % signs, take the rightmost one
R$* % $* $1 @ $2 First make them all @s.
R$* @ $* @ $* $1 % $2 @ $3 Undo all but the last.
R$* @ $* $@ $>Canonify2 $1 < @ $2 > Insert < > and finish

# else we must be a local name
R$* $@ $>Canonify2 $1


################################################
### Ruleset 96 -- bottom half of ruleset 3 ###
################################################

SCanonify2=96

# handle special cases for local names
R$* < @ localhost > $* $: $1 < @ $j . > $2 no domain at all
R$* < @ localhost . $m > $* $: $1 < @ $j . > $2 local domain
R$* < @ localhost . UUCP > $* $: $1 < @ $j . > $2 .UUCP domain

# check for IPv4/IPv6 domain literal
R$* < @ [ $+ ] > $* $: $1 < @@ [ $2 ] > $3 mark [addr]
R$* < @@ $=w > $* $: $1 < @ $j . > $3 self-literal
R$* < @@ $+ > $* $@ $1 < @ $2 > $3 canon IP addr





# if really UUCP, handle it immediately

# try UUCP traffic as a local address
R$* < @ $+ . UUCP > $* $: $1 < @ $[ $2 $] . UUCP . > $3
R$* < @ $+ . . UUCP . > $* $@ $1 < @ $2 . > $3

# hostnames ending in class P are always canonical
R$* < @ $* $=P > $* $: $1 < @ $2 $3 . > $4
R$* < @ $* $~P > $* $: $&{daemon_flags} $| $1 < @ $2 $3 > $4
R$* CC $* $| $* < @ $+.$+ > $* $: $3 < @ $4.$5 . > $6
R$* CC $* $| $* $: $3
# pass to name server to make hostname canonical
R$* $| $* < @ $* > $* $: $2 < @ $[ $3 $] > $4
R$* $| $* $: $2

# local host aliases and pseudo-domains are always canonical
R$* < @ $=w > $* $: $1 < @ $2 . > $3
R$* < @ $=M > $* $: $1 < @ $2 . > $3
R$* < @ $* . . > $* $1 < @ $2 . > $3


##################################################
### Ruleset 4 -- Final Output Post-rewriting ###
##################################################
Sfinal=4

R$+ :; <@> $@ $1 : handle <list:;>
R$* <@> $@ handle <> and list:;

# strip trailing dot off possibly canonical name
R$* < @ $+ . > $* $1 < @ $2 > $3

# eliminate internal code
R$* < @ *LOCAL* > $* $1 < @ $j > $2

# externalize local domain info
R$* < $+ > $* $1 $2 $3 defocus
R@ $+ : @ $+ : $+ @ $1 , @ $2 : $3 <route-addr> canonical
R@ $* $@ @ $1 ... and exit

# UUCP must always be presented in old form
R$+ @ $- . UUCP $2!$1 u@h.UUCP => h!u

# delete duplicate local names
R$+ % $=w @ $=w $1 @ $2 u%host@host => u@host



##############################################################
### Ruleset 97 -- recanonicalize and call ruleset zero ###
### (used for recursive calls) ###
##############################################################

SRecurse=97
R$* $: $>canonify $1
R$* $@ $>parse $1


######################################
### Ruleset 0 -- Parse Address ###
######################################

Sparse=0

R$* $: $>Parse0 $1 initial parsing
R<@> $#local $: <@> special case error msgs
R$* $: $>ParseLocal $1 handle local hacks
R$* $: $>Parse1 $1 final parsing

#
# Parse0 -- do initial syntax checking and eliminate local addresses.
# This should either return with the (possibly modified) input
# or return with a #error mailer. It should not return with a
# #mailer other than the #error mailer.
#

SParse0
R<@> $@ <@> special case error msgs
R$* : $* ; <@> $#error $@ 5.1.3 $: "553 List:; syntax illegal for recipient addresses"
R@ <@ $* > < @ $1 > catch "@@host" bogosity
R<@ $+> $#error $@ 5.1.3 $: "553 User address required"
R$+ <@> $#error $@ 5.1.3 $: "553 Hostname required"
R$* $: <> $1
R<> $* < @ [ $* ] : $+ > $* $1 < @ [ $2 ] : $3 > $4
R<> $* < @ [ $* ] , $+ > $* $1 < @ [ $2 ] , $3 > $4
R<> $* < @ [ $* ] $+ > $* $#error $@ 5.1.2 $: "553 Invalid address"
R<> $* < @ [ $+ ] > $* $1 < @ [ $2 ] > $3
R<> $* <$* : $* > $* $#error $@ 5.1.3 $: "553 Colon illegal in host name part"
R<> $* $1
R$* < @ . $* > $* $#error $@ 5.1.2 $: "553 Invalid host name"
R$* < @ $* .. $* > $* $#error $@ 5.1.2 $: "553 Invalid host name"
R$* < @ $* @ > $* $#error $@ 5.1.2 $: "553 Invalid route address"
R$* @ $* < @ $* > $* $#error $@ 5.1.3 $: "553 Invalid route address"
R$* , $~O $* $#error $@ 5.1.3 $: "553 Invalid route address"


# now delete the local info -- note $=O to find characters that cause forwarding
R$* < @ > $* $@ $>Parse0 $>canonify $1 user@ => user
R< @ $=w . > : $* $@ $>Parse0 $>canonify $2 @here:... -> ...
R$- < @ $=w . > $: $(dequote $1 $) < @ $2 . > dequote "foo"@here
R< @ $+ > $#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ $=w . > $@ $>Parse0 $>canonify $1 $2 $3 ...@here -> ...
R$- $: $(dequote $1 $) < @ *LOCAL* > dequote "foo"
R< @ *LOCAL* > $#error $@ 5.1.3 $: "553 User address required"
R$* $=O $* < @ *LOCAL* >
$@ $>Parse0 $>canonify $1 $2 $3 ...@*LOCAL* -> ...
R$* < @ *LOCAL* > $: $1

#
# Parse1 -- the bottom half of ruleset 0.
#

SParse1

# handle numeric address spec
R$* < @ [ $+ ] > $* $: $>ParseLocal $1 < @ [ $2 ] > $3 numeric internet spec
R$* < @ [ $+ ] > $* $: $1 < @ [ $2 ] : $S > $3 Add smart host to path
R$* < @ [ $+ ] : > $* $#esmtp $@ [$2] $: $1 < @ [$2] > $3 no smarthost: send
R$* < @ [ $+ ] : $- : $*> $* $#$3 $@ $4 $: $1 < @ [$2] > $5 smarthost with mailer
R$* < @ [ $+ ] : $+ > $* $#esmtp $@ $3 $: $1 < @ [$2] > $4 smarthost without mailer


# short circuit local delivery so forwarded email works


R$=L < @ $=w . > $#local $: @ $1 special local names
R$+ < @ $=w . > $#local $: $1 regular local name


# resolve remotely connected UUCP links (if any)

# resolve fake top level domains by forwarding to other hosts



# pass names that still have a host to a smarthost (if defined)
R$* < @ $* > $* $: $>MailerToTriple < $S > $1 < @ $2 > $3 glue on smarthost name

# deal with other remote names
R$* < @$* > $* $#esmtp $@ $2 $: $1 < @ $2 > $3 user@host.domain

# handle locally delivered names
R$=L $#local $: @ $1 special local names
R$+ $#local $: $1 regular local names

###########################################################################
### Ruleset 5 -- special rewriting after aliases have been expanded ###
###########################################################################

SLocal_localaddr
Slocaladdr=5
R$+ $: $1 $| $>"Local_localaddr" $1
R$+ $| $#ok $@ $1 no change
R$+ $| $#$* $#$2
R$+ $| $* $: $1




# deal with plussed users so aliases work nicely
R$+ + * $#local $@ $&h $: $1
R$+ + $* $#local $@ + $2 $: $1 + *

# prepend an empty "forward host" on the front
R$+ $: <> $1



R< > $+ $: < > < $1 <> $&h > nope, restore +detail

R< > < $+ <> + $* > $: < > < $1 + $2 > check whether +detail
R< > < $+ <> $* > $: < > < $1 > else discard
R< > < $+ + $* > $* < > < $1 > + $2 $3 find the user part
R< > < $+ > + $* $#local $@ $2 $: @ $1 strip the extra +
R< > < $+ > $@ $1 no +detail
R$+ $: $1 <> $&h add +detail back in

R$+ <> + $* $: $1 + $2 check whether +detail
R$+ <> $* $: $1 else discard
R< local : $* > $* $: $>MailerToTriple < local : $1 > $2 no host extension
R< error : $* > $* $: $>MailerToTriple < error : $1 > $2 no host extension

R< $~[ : $+ > $+ $: $>MailerToTriple < $1 : $2 > $3 < @ $2 >

R< $+ > $+ $@ $>MailerToTriple < $1 > $2 < @ $1 >


###################################################################
### Ruleset 95 -- canonify mailer:[user@]host syntax to triple ###
###################################################################

SMailerToTriple=95
R< > $* $@ $1 strip off null relay
R< error : $-.$-.$- : $+ > $* $#error $@ $1.$2.$3 $: $4
R< error : $- : $+ > $* $#error $@ $(dequote $1 $) $: $2
R< error : $+ > $* $#error $: $1
R< local : $* > $* $>CanonLocal < $1 > $2
R< $~[ : $+ @ $+ > $*<$*>$* $# $1 $@ $3 $: $2<@$3> use literal user
R< $~[ : $+ > $* $# $1 $@ $2 $: $3 try qualified mailer
R< $=w > $* $@ $2 delete local host
R< $+ > $* $#relay $@ $1 $: $2 use unqualified mailer

###################################################################
### Ruleset CanonLocal -- canonify local: syntax ###
###################################################################

SCanonLocal
# strip local host from routed addresses
R< $* > < @ $+ > : $+ $@ $>Recurse $3
R< $* > $+ $=O $+ < @ $+ > $@ $>Recurse $2 $3 $4

# strip trailing dot from any host name that may appear
R< $* > $* < @ $* . > $: < $1 > $2 < @ $3 >

# handle local: syntax -- use old user, either with or without host
R< > $* < @ $* > $* $#local $@ $1@$2 $: $1
R< > $+ $#local $@ $1 $: $1

# handle local:user@host syntax -- ignore host part
R< $+ @ $+ > $* < @ $* > $: < $1 > $3 < @ $4 >

# handle local:user syntax
R< $+ > $* <@ $* > $* $#local $@ $2@$3 $: $1
R< $+ > $* $#local $@ $2 $: $1

###################################################################
### Ruleset 93 -- convert header names to masqueraded form ###
###################################################################

SMasqHdr=93


# do not masquerade anything in class N
R$* < @ $* $=N . > $@ $1 < @ $2 $3 . >

R$* < @ *LOCAL* > $@ $1 < @ $j . >

###################################################################
### Ruleset 94 -- convert envelope names to masqueraded form ###
###################################################################

SMasqEnv=94
R$* < @ *LOCAL* > $* $: $1 < @ $j . > $2

###################################################################
### Ruleset 98 -- local part of ruleset zero (can be null) ###
###################################################################

SParseLocal=98



######################################################################
### D: LookUpDomain -- search for domain in access database
###
### Parameters:
### <$1> -- key (domain name)
### <$2> -- default (what to return if not found in db)
### <$3> -- mark (must be <(!|+) single-token>)
### ! does lookup only with tag
### + does lookup with and without tag
### <$4> -- passthru (additional data passed unchanged through)
######################################################################

SD
R<$*> <$+> <$- $-> <$*> $: < $(access $4:$1 $: ? $) > <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$+> <+ $-> <$*> $: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4>
R<SKIP> <$+> <$+> <$- $-> <$*> $@ <$2> <$5>
R<?> <[$+.$-]> <$+> <$- $-> <$*> $@ $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <[$+::$-]> <$+> <$- $-> <$*> $: $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <[$+:$-]> <$+> <$- $-> <$*> $: $>D <[$1]> <$3> <$4 $5> <$6>
R<?> <$+.$+> <$+> <$- $-> <$*> $@ $>D <$2> <$3> <$4 $5> <$6>
R<?> <$+> <$+> <$- $-> <$*> $@ <$2> <$5>
R<$* <TMPF>> <$+> <$+> <$- $-> <$*> $@ <<TMPF>> <$6>
R<$*> <$+> <$+> <$- $-> <$*> $@ <$1> <$6>

######################################################################
### A: LookUpAddress -- search for host address in access database
###
### Parameters:
### <$1> -- key (dot quadded host address)
### <$2> -- default (what to return if not found in db)
### <$3> -- mark (must be <(!|+) single-token>)
### ! does lookup only with tag
### + does lookup with and without tag
### <$4> -- passthru (additional data passed through)
######################################################################

SA
R<$+> <$+> <$- $-> <$*> $: < $(access $4:$1 $: ? $) > <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$+> <+ $-> <$*> $: < $(access $1 $: ? $) > <$1> <$2> <+ $3> <$4>
R<SKIP> <$+> <$+> <$- $-> <$*> $@ <$2> <$5>
R<?> <$+::$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+:$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+.$-> <$+> <$- $-> <$*> $@ $>A <$1> <$3> <$4 $5> <$6>
R<?> <$+> <$+> <$- $-> <$*> $@ <$2> <$5>
R<$* <TMPF>> <$+> <$+> <$- $-> <$*> $@ <<TMPF>> <$6>
R<$*> <$+> <$+> <$- $-> <$*> $@ <$1> <$6>

######################################################################
### CanonAddr -- Convert an address into a standard form for
### relay checking. Route address syntax is
### crudely converted into a %-hack address.
###
### Parameters:
### $1 -- full recipient address
###
### Returns:
### parsed address, not in source route form
######################################################################

SCanonAddr
R$* $: $>Parse0 $>canonify $1 make domain canonical


######################################################################
### ParseRecipient -- Strip off hosts in $=R as well as possibly
### $* $=m or the access database.
### Check user portion for host separators.
###
### Parameters:
### $1 -- full recipient address
###
### Returns:
### parsed, non-local-relaying address
######################################################################

SParseRecipient
R$* $: <?> $>CanonAddr $1
R<?> $* < @ $* . > <?> $1 < @ $2 > strip trailing dots
R<?> $- < @ $* > $: <?> $(dequote $1 $) < @ $2 > dequote local part

# if no $=O character, no host in the user portion, we are done
R<?> $* $=O $* < @ $* > $: <NO> $1 $2 $3 < @ $4>
R<?> $* $@ $1


R<NO> $* < @ $* $=R > $: <RELAY> $1 < @ $2 $3 >
R<NO> $* < @ $+ > $: $>D <$2> <NO> <+ To> <$1 < @ $2 >>
R<$+> <$+> $: <$1> $2



R<RELAY> $* < @ $* > $@ $>ParseRecipient $1
R<$+> $* $@ $2


######################################################################
### check_relay -- check hostname/address on SMTP startup
######################################################################

Scheck_relay
R$* $: $>"RateControl" dummy
R$* $: $>"ConnControl" dummy

SLocal_check_relay
Scheckrelay
R$* $: $1 $| $>"Local_check_relay" $1
R$* $| $* $| $#$* $#$3
R$* $| $* $| $* $@ $>"Basic_check_relay" $1 $| $2

SBasic_check_relay
# check for deferred delivery mode
R$* $: < $&{deliveryMode} > $1
R< d > $* $@ deferred
R< $* > $* $: $2

R$+ $| $+ $: $>D < $1 > <?> <+ Connect> < $2 >
R $| $+ $: $>A < $1 > <?> <+ Connect> <> empty client_name
R<?> <$+> $: $>A < $1 > <?> <+ Connect> <> no: another lookup
R<?> <$*> $: OK found nothing
R<$={Accept}> <$*> $@ $1 return value of lookup
R<REJECT> <$*> $#error $@ 5.7.1 $: "550 Access denied"
R<DISCARD> <$*> $#discard $: discard
R<QUARANTINE:$+> <$*> $#error $@ quarantine $: $1
R<ERROR:$-.$-.$-:$+> <$*> $#error $@ $1.$2.$3 $: $4
R<ERROR:$+> <$*> $#error $: $1
R<$* <TMPF>> <$*> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$+> <$*> $#error $: $1





######################################################################
### check_mail -- check SMTP `MAIL FROM:' command argument
######################################################################

SLocal_check_mail
Scheckmail
R$* $: $1 $| $>"Local_check_mail" $1
R$* $| $#$* $#$2
R$* $| $* $@ $>"Basic_check_mail" $1

SBasic_check_mail
# check for deferred delivery mode
R$* $: < $&{deliveryMode} > $1
R< d > $* $@ deferred
R< $* > $* $: $2

# authenticated?
R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL
R$* $| $#$+ $#$2
R$* $| $* $: $1

R<> $@ <OK> we MUST accept <> (RFC 1123)
R$+ $: <?> $1
R<?><$+> $: <@> <$1>
R<?>$+ $: <@> <$1>
R$* $: $&{daemon_flags} $| $1
R$* f $* $| <@> < $* @ $- > $: < ? $&{client_name} > < $3 @ $4 >
R$* u $* $| <@> < $* > $: <?> < $3 >
R$* $| $* $: $2
# handle case of @localhost on address
R<@> < $* @ localhost > $: < ? $&{client_name} > < $1 @ localhost >
R<@> < $* @ [127.0.0.1] >
$: < ? $&{client_name} > < $1 @ [127.0.0.1] >
R<@> < $* @ localhost.$m >
$: < ? $&{client_name} > < $1 @ localhost.$m >
R<@> < $* @ localhost.UUCP >
$: < ? $&{client_name} > < $1 @ localhost.UUCP >
R<@> $* $: $1 no localhost as domain
R<? $=w> $* $: $2 local client: ok
R<? $+> <$+> $#error $@ 5.5.4 $: "553 Real domain name required for sender address"
R<?> $* $: $1
R$* $: <?> $>CanonAddr $1 canonify sender address and mark it
R<?> $* < @ $+ . > <?> $1 < @ $2 > strip trailing dots
# handle non-DNS hostnames (*.bitnet, *.decnet, *.uucp, etc)
R<?> $* < @ $* $=P > $: <OKR> $1 < @ $2 $3 >
R<?> $* < @ $j > $: <OKR> $1 < @ $j >
R<?> $* < @ $+ > $: <? $(resolve $2 $: $2 <PERM> $) > $1 < @ $2 >
R<? $* <$->> $* < @ $+ >
$: <$2> $3 < @ $4 >

# check sender address: user@address, user@, address
R<$+> $+ < @ $* > $: @<$1> <$2 < @ $3 >> $| <F:$2@$3> <U:$2@> <D:$3>
R<$+> $+ $: @<$1> <$2> $| <U:$2@>
R@ <$+> <$*> $| <$+> $: <@> <$1> <$2> $| $>SearchList <+ From> $| <$3> <>
R<@> <$+> <$*> $| <$*> $: <$3> <$1> <$2> reverse result
# retransform for further use
R<?> <$+> <$*> $: <$1> $2 no match
R<$+> <$+> <$*> $: <$1> $3 relevant result, keep it

# handle case of no @domain on address
R<?> $* $: $&{daemon_flags} $| <?> $1
R$* u $* $| <?> $* $: <OKR> $3
R$* $| $* $: $2
R<?> $* $: < ? $&{client_addr} > $1
R<?> $* $@ <OKR> ...local unqualed ok
R<? $+> $* $#error $@ 5.5.4 $: "553 Domain name required for sender address " $&f
...remote is not
# check results
R<?> $* $: @ $1 mark address: nothing known about it
R<$={ResOk}> $* $: @ $2 domain ok
R<TEMP> $* $#error $@ 4.1.8 $: "451 Domain of sender address " $&f " does not resolve"
R<PERM> $* $#error $@ 5.1.8 $: "553 Domain of sender address " $&f " does not exist"
R<$={Accept}> $* $# $1 accept from access map
R<DISCARD> $* $#discard $: discard
R<QUARANTINE:$+> $* $#error $@ quarantine $: $1
R<REJECT> $* $#error $@ 5.7.1 $: "550 Access denied"
R<ERROR:$-.$-.$-:$+> $* $#error $@ $1.$2.$3 $: $4
R<ERROR:$+> $* $#error $: $1
R<<TMPF>> $* $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$+> $* $#error $: $1 error from access db



######################################################################
### check_rcpt -- check SMTP `RCPT TO:' command argument
######################################################################

SLocal_check_rcpt
Scheckrcpt
R$* $: $1 $| $>"Local_check_rcpt" $1
R$* $| $#$* $#$2
R$* $| $* $@ $>"Basic_check_rcpt" $1

SBasic_check_rcpt
# empty address?
R<> $#error $@ nouser $: "553 User address required"
R$@ $#error $@ nouser $: "553 User address required"
# check for deferred delivery mode
R$* $: < $&{deliveryMode} > $1
R< d > $* $@ deferred
R< $* > $* $: $2


######################################################################
R$* $: $1 $| @ $>"Rcpt_ok" $1
R$* $| @ $#TEMP $+ $: $1 $| T $2
R$* $| @ $#$* $#$2
R$* $| @ RELAY $@ RELAY
R$* $| @ $* $: O $| $>"Relay_ok" $1
R$* $| T $+ $: T $2 $| $>"Relay_ok" $1
R$* $| $#TEMP $+ $#error $2
R$* $| $#$* $#$2
R$* $| RELAY $@ RELAY
R T $+ $| $* $#error $1
# anything else is bogus
R$* $#error $@ 5.7.1 $: "550 Relaying denied"


######################################################################
### Rcpt_ok: is the recipient ok?
######################################################################
SRcpt_ok
R$* $: $>ParseRecipient $1 strip relayable hosts




# authenticated via TLS?
R$* $: $1 $| $>RelayTLS client authenticated?
R$* $| $# $+ $# $2 error/ok?
R$* $| $* $: $1 no

R$* $: $1 $| $>"Local_Relay_Auth" $&{auth_type}
R$* $| $# $* $# $2
R$* $| NO $: $1
R$* $| $* $: $1 $| $&{auth_type}
R$* $| $: $1
R$* $| $={TrustAuthMech} $# RELAY
R$* $| $* $: $1
# anything terminating locally is ok
R$+ < @ $=w > $@ RELAY
R$+ < @ $* $=R > $@ RELAY
R$+ < @ $+ > $: $>D <$2> <?> <+ To> <$1 < @ $2 >>
R<RELAY> $* $@ RELAY
R<$* <TMPF>> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*> $: $2



# check for local user (i.e. unqualified address)
R$* $: <?> $1
R<?> $* < @ $+ > $: <REMOTE> $1 < @ $2 >
# local user is ok
R<?> $+ $@ RELAY
R<$+> $* $: $2

######################################################################
### Relay_ok: is the relay/sender ok?
######################################################################
SRelay_ok
# anything originating locally is ok
# check IP address
R$* $: $&{client_addr}
R$@ $@ RELAY originated locally
R0 $@ RELAY originated locally
R127.0.0.1 $@ RELAY originated locally
RIPv6:::1 $@ RELAY originated locally
R$=R $* $@ RELAY relayable IP address
R$* $: $>A <$1> <?> <+ Connect> <$1>
R<RELAY> $* $@ RELAY relayable IP address

R<<TMPF>> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*> $: $2
R$* $: [ $1 ] put brackets around it...
R$=w $@ RELAY ... and see if it is local


# check client name: first: did it resolve?
R$* $: < $&{client_resolve} >
R<TEMP> $#TEMP $@ 4.4.0 $: "450 Relaying temporarily denied. Cannot resolve PTR record for " $&{client_addr}
R<FORGED> $#error $@ 5.7.1 $: "550 Relaying denied. IP name possibly forged " $&{client_name}
R<FAIL> $#error $@ 5.7.1 $: "550 Relaying denied. IP name lookup failed " $&{client_name}
R$* $: <@> $&{client_name}
# pass to name server to make hostname canonical
R<@> $* $=P $:<?> $1 $2
R<@> $+ $:<?> $[ $1 $]
R$* . $1 strip trailing dots
R<?> $=w $@ RELAY
R<?> $* $=R $@ RELAY
R<?> $* $: $>D <$1> <?> <+ Connect> <$1>
R<RELAY> $* $@ RELAY
R<$* <TMPF>> $* $#TEMP $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<$*> <$*> $: $2

# turn a canonical address in the form user<@domain>
# qualify unqual. addresses with $j
SFullAddr
R$* <@ $+ . > $1 <@ $2 >
R$* <@ $* > $@ $1 <@ $2 >
R$+ $@ $1 <@ $j >

SDelay_TLS_Clt
# authenticated?
R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL
R$* $| $#$+ $#$2
R$* $| $* $# $1
R$* $# $1

SDelay_TLS_Clt2
# authenticated?
R$* $: $1 $| $>"tls_client" $&{verify} $| MAIL
R$* $| $#$+ $#$2
R$* $| $* $@ $1
R$* $@ $1

# call all necessary rulesets
Scheck_rcpt
# R$@ $#error $@ 5.1.3 $: "553 Recipient address required"

R$+ $: $1 $| $>checkrcpt $1
R$+ $| $#error $* $#error $2
R$+ $| $#discard $* $#discard $2
R$+ $| $#$* $@ $>"Delay_TLS_Clt" $2
R$+ $| $* $: <?> $>FullAddr $>CanonAddr $1
R<?> $+ < @ $=w > $: <> $1 < @ $2 > $| <F: $1@$2 > <D: $2 > <U: $1@>
R<?> $+ < @ $* > $: <> $1 < @ $2 > $| <F: $1@$2 > <D: $2 >
# lookup the addresses only with Spam tag
R<> $* $| <$+> $: <@> $1 $| $>SearchList <! Spam> $| <$2> <>
R<@> $* $| $* $: $2 $1 reverse result
# is the recipient a spam friend?
R<FRIEND> $+ $@ $>"Delay_TLS_Clt2" SPAMFRIEND
R<$*> $+ $: $2

R$* $: $1 $| $>checkmail $&{mail_from}
R$* $| $#$* $#$2
R$* $| $* $: $1 $| $>checkrelay $&{client_name} $| $&{client_addr}
R$* $| $#$* $#$2
R$* $| $* $: $1



######################################################################
### F: LookUpFull -- search for an entry in access database
###
### lookup of full key (which should be an address) and
### variations if +detail exists: +* and without +detail
###
### Parameters:
### <$1> -- key
### <$2> -- default (what to return if not found in db)
### <$3> -- mark (must be <(!|+) single-token>)
### ! does lookup only with tag
### + does lookup with and without tag
### <$4> -- passthru (additional data passed unchanged through)
######################################################################

SF
R<$+> <$*> <$- $-> <$*> $: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+ + $* @ $+> <$*> <$- $-> <$*>
$: <$(access $6:$1+*@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7>
R<?> <$+ + $* @ $+> <$*> <+ $-> <$*>
$: <$(access $1+*@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6>
R<?> <$+ + $* @ $+> <$*> <$- $-> <$*>
$: <$(access $6:$1@$3 $: ? $)> <$1+$2@$3> <$4> <$5 $6> <$7>
R<?> <$+ + $* @ $+> <$*> <+ $-> <$*>
$: <$(access $1@$3 $: ? $)> <$1+$2@$3> <$4> <+ $5> <$6>
R<?> <$+> <$*> <$- $-> <$*> $@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*> $@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*> $@ <$1> <$5>

######################################################################
### E: LookUpExact -- search for an entry in access database
###
### Parameters:
### <$1> -- key
### <$2> -- default (what to return if not found in db)
### <$3> -- mark (must be <(!|+) single-token>)
### ! does lookup only with tag
### + does lookup with and without tag
### <$4> -- passthru (additional data passed unchanged through)
######################################################################

SE
R<$*> <$*> <$- $-> <$*> $: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+> <$*> <$- $-> <$*> $@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*> $@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*> $@ <$1> <$5>

######################################################################
### U: LookUpUser -- search for an entry in access database
###
### lookup of key (which should be a local part) and
### variations if +detail exists: +* and without +detail
###
### Parameters:
### <$1> -- key (user@)
### <$2> -- default (what to return if not found in db)
### <$3> -- mark (must be <(!|+) single-token>)
### ! does lookup only with tag
### + does lookup with and without tag
### <$4> -- passthru (additional data passed unchanged through)
######################################################################

SU
R<$+> <$*> <$- $-> <$*> $: <$(access $4:$1 $: ? $)> <$1> <$2> <$3 $4> <$5>
R<?> <$+> <$*> <+ $-> <$*> $: <$(access $1 $: ? $)> <$1> <$2> <+ $3> <$4>
R<?> <$+ + $* @> <$*> <$- $-> <$*>
$: <$(access $5:$1+*@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6>
R<?> <$+ + $* @> <$*> <+ $-> <$*>
$: <$(access $1+*@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5>
R<?> <$+ + $* @> <$*> <$- $-> <$*>
$: <$(access $5:$1@ $: ? $)> <$1+$2@> <$3> <$4 $5> <$6>
R<?> <$+ + $* @> <$*> <+ $-> <$*>
$: <$(access $1@ $: ? $)> <$1+$2@> <$3> <+ $4> <$5>
R<?> <$+> <$*> <$- $-> <$*> $@ <$2> <$5>
R<$+ <TMPF>> <$*> <$- $-> <$*> $@ <<TMPF>> <$5>
R<$+> <$*> <$- $-> <$*> $@ <$1> <$5>

######################################################################
### SearchList: search a list of items in the access map
### Parameters:
### <exact tag> $| <mark:address> <mark:address> ... <>
### where "exact" is either "+" or "!":
### <+ TAG> lookup with and w/o tag
### <! TAG> lookup with tag
### possible values for "mark" are:
### D: recursive host lookup (LookUpDomain)
### E: exact lookup, no modifications
### F: full lookup, try user+ext@domain and user@domain
### U: user lookup, try user+ext and user (input must have trailing @)
### return: <RHS of lookup> or <?> (not found)
######################################################################

# class with valid marks for SearchList
C{Src}E F D U A
SSearchList
# just call the ruleset with the name of the tag... nice trick...
R<$+> $| <$={Src}:$*> <$*> $: <$1> $| <$4> $| $>$2 <$3> <?> <$1> <>
R<$+> $| <> $| <?> <> $@ <?>
R<$+> $| <$+> $| <?> <> $@ $>SearchList <$1> $| <$2>
R<$+> $| <$*> $| <$+> <> $@ <$3>
R<$+> $| <$+> $@ <$2>


######################################################################
### trust_auth: is user trusted to authenticate as someone else?
###
### Parameters:
### $1: AUTH= parameter from MAIL command
######################################################################

SLocal_trust_auth
Strust_auth
R$* $: $&{auth_type} $| $1
# required by RFC 2554 section 4.
R$@ $| $* $#error $@ 5.7.1 $: "550 not authenticated"
R$* $| $&{auth_authen} $@ identical
R$* $| <$&{auth_authen}> $@ identical
R$* $| $* $: $1 $| $>"Local_trust_auth" $2
R$* $| $#$* $#$2
R$* $#error $@ 5.7.1 $: "550 " $&{auth_authen} " not allowed to act as " $&{auth_author}

######################################################################
### Relay_Auth: allow relaying based on authentication?
###
### Parameters:
### $1: ${auth_type}
######################################################################
SLocal_Relay_Auth

######################################################################
### srv_features: which features to offer to a client?
### (done in server)
######################################################################
Ssrv_features
R$* $: $>D <$&{client_name}> <?> <! "Srv_Features"> <>
R<?>$* $: $>A <$&{client_addr}> <?> <! "Srv_Features"> <>
R<?>$* $: <$(access "Srv_Features": $: ? $)>
R<?>$* $@ OK
R<$* <TMPF>>$* $#temp
R<$+>$* $# $1

######################################################################
### try_tls: try to use STARTTLS?
### (done in client)
######################################################################
Stry_tls
R$* $: $>D <$&{server_name}> <?> <! "Try_TLS"> <>
R<?>$* $: $>A <$&{server_addr}> <?> <! "Try_TLS"> <>
R<?>$* $: <$(access "Try_TLS": $: ? $)>
R<?>$* $@ OK
R<$* <TMPF>>$* $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<NO>$* $#error $@ 5.7.1 $: "550 do not try TLS with " $&{server_name} " ["$&{server_addr}"]"

######################################################################
### tls_rcpt: is connection with server "good" enough?
### (done in client, per recipient)
###
### Parameters:
### $1: recipient
######################################################################
Stls_rcpt
R$* $: $(macro {TLS_Name} $@ $&{server_name} $) $1
R$+ $: <?> $>CanonAddr $1
R<?> $+ < @ $+ . > <?> $1 <@ $2 >
R<?> $+ < @ $+ > $: $1 <@ $2 > $| <F:$1@$2> <U:$1@> <D:$2> <E:>
R<?> $+ $: $1 $| <U:$1@> <E:>
R$* $| $+ $: $1 $| $>SearchList <! "TLS_Rcpt"> $| $2 <>
R$* $| <?> $@ OK
R$* $| <$* <TMPF>> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$* $| <$+> $@ $>"TLS_connection" $&{verify} $| <$2>

######################################################################
### tls_client: is connection with client "good" enough?
### (done in server)
###
### Parameters:
### ${verify} $| (MAIL|STARTTLS)
######################################################################
Stls_client
R$* $: $(macro {TLS_Name} $@ $&{server_name} $) $1
R$* $| $* $: $1 $| $>D <$&{client_name}> <?> <! "TLS_Clt"> <>
R$* $| <?>$* $: $1 $| $>A <$&{client_addr}> <?> <! "TLS_Clt"> <>
R$* $| <?>$* $: $1 $| <$(access "TLS_Clt": $: ? $)>
R$* $| <$* <TMPF>> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$* $@ $>"TLS_connection" $1

######################################################################
### tls_server: is connection with server "good" enough?
### (done in client)
###
### Parameter:
### ${verify}
######################################################################
Stls_server
R$* $: $(macro {TLS_Name} $@ $&{server_name} $) $1
R$* $: $1 $| $>D <$&{server_name}> <?> <! "TLS_Srv"> <>
R$* $| <?>$* $: $1 $| $>A <$&{server_addr}> <?> <! "TLS_Srv"> <>
R$* $| <?>$* $: $1 $| <$(access "TLS_Srv": $: ? $)>
R$* $| <$* <TMPF>> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R$* $@ $>"TLS_connection" $1

######################################################################
### TLS_connection: is TLS connection "good" enough?
###
### Parameters:
### ${verify} $| <Requirement> [<>]
### Requirement: RHS from access map, may be ? for none.
######################################################################
STLS_connection
R$* $| <$*>$* $: $1 $| <$2>
# create the appropriate error codes
R$* $| <PERM + $={Tls} $*> $: $1 $| <503:5.7.0> <$2 $3>
R$* $| <TEMP + $={Tls} $*> $: $1 $| <403:4.7.0> <$2 $3>
R$* $| <$={Tls} $*> $: $1 $| <403:4.7.0> <$2 $3>
# deal with TLS handshake failures: abort
RSOFTWARE $| <$-:$+> $* $#error $@ $2 $: $1 " TLS handshake failed."
RSOFTWARE $| $* $#error $@ 4.7.0 $: "403 TLS handshake failed."
# deal with TLS protocol errors: abort
RPROTOCOL $| <$-:$+> $* $#error $@ $2 $: $1 " STARTTLS failed."
RPROTOCOL $| $* $#error $@ 4.7.0 $: "403 STARTTLS failed."
R$* $| <$*> <VERIFY> $: <$2> <VERIFY> <> $1
R$* $| <$*> <VERIFY + $+> $: <$2> <VERIFY> <$3> $1
R$* $| <$*> <$={Tls}:$->$* $: <$2> <$3:$4> <> $1
R$* $| <$*> <$={Tls}:$- + $+>$* $: <$2> <$3:$4> <$5> $1
R$* $| $* $@ OK
# authentication required: give appropriate error
# other side did authenticate (via STARTTLS)
R<$*><VERIFY> <> OK $@ OK
R<$*><VERIFY> <$+> OK $: <$1> <REQ:0> <$2>
R<$*><VERIFY:$-> <$*> OK $: <$1> <REQ:$2> <$3>
R<$*><ENCR:$-> <$*> $* $: <$1> <REQ:$2> <$3>
R<$-:$+><VERIFY $*> <$*> $#error $@ $2 $: $1 " authentication required"
R<$-:$+><VERIFY $*> <$*> FAIL $#error $@ $2 $: $1 " authentication failed"
R<$-:$+><VERIFY $*> <$*> NO $#error $@ $2 $: $1 " not authenticated"
R<$-:$+><VERIFY $*> <$*> NOT $#error $@ $2 $: $1 " no authentication requested"
R<$-:$+><VERIFY $*> <$*> NONE $#error $@ $2 $: $1 " other side does not support STARTTLS"
R<$-:$+><VERIFY $*> <$*> $+ $#error $@ $2 $: $1 " authentication failure " $4
R<$*><REQ:$-> <$*> $: <$1> <REQ:$2> <$3> $>max $&{cipher_bits} : $&{auth_ssf}
R<$*><REQ:$-> <$*> $- $: <$1> <$2:$4> <$3> $(arith l $@ $4 $@ $2 $)
R<$-:$+><$-:$-> <$*> TRUE $#error $@ $2 $: $1 " encryption too weak " $4 " less than " $3
R<$-:$+><$-:$-> <$*> $* $: <$1:$2 ++ $5>
R<$-:$+ ++ > $@ OK
R<$-:$+ ++ $+ > $: <$1:$2> <$3>
R<$-:$+> < $+ ++ $+ > <$1:$2> <$3> <$4>
R<$-:$+> $+ $@ $>"TLS_req" $3 $| <$1:$2>

######################################################################
### TLS_req: check additional TLS requirements
###
### Parameters: [<list> <of> <req>] $| <$-:$+>
### $-: SMTP reply code
### $+: Enhanced Status Code
######################################################################
STLS_req
R $| $+ $@ OK
R<CN> $* $| <$+> $: <CN:$&{TLS_Name}> $1 $| <$2>
R<CN:$&{cn_subject}> $* $| <$+> $@ $>"TLS_req" $1 $| <$2>
R<CN:$+> $* $| <$-:$+> $#error $@ $4 $: $3 " CN " $&{cn_subject} " does not match " $1
R<CS:$&{cert_subject}> $* $| <$+> $@ $>"TLS_req" $1 $| <$2>
R<CS:$+> $* $| <$-:$+> $#error $@ $4 $: $3 " Cert Subject " $&{cert_subject} " does not match " $1
R<CI:$&{cert_issuer}> $* $| <$+> $@ $>"TLS_req" $1 $| <$2>
R<CI:$+> $* $| <$-:$+> $#error $@ $4 $: $3 " Cert Issuer " $&{cert_issuer} " does not match " $1
ROK $@ OK

######################################################################
### max: return the maximum of two values separated by :
###
### Parameters: [$-]:[$-]
######################################################################
Smax
R: $: 0
R:$- $: $1
R$-: $: $1
R$-:$- $: $(arith l $@ $1 $@ $2 $) : $1 : $2
RTRUE:$-:$- $: $2
R$-:$-:$- $: $2


######################################################################
### RelayTLS: allow relaying based on TLS authentication
###
### Parameters:
### none
######################################################################
SRelayTLS
# authenticated?
R$* $: <?> $&{verify}
R<?> OK $: OK authenticated: continue
R<?> $* $@ NO not authenticated
R$* $: $&{cert_issuer}
R$+ $: $(access CERTISSUER:$1 $)
RRELAY $# RELAY
RSUBJECT $: <@> $&{cert_subject}
R<@> $+ $: <@> $(access CERTSUBJECT:$1 $)
R<@> RELAY $# RELAY
R$* $: NO

######################################################################
### authinfo: lookup authinfo in the access map
###
### Parameters:
### $1: {server_name}
### $2: {server_addr}
######################################################################
Sauthinfo
R$* $: $1 $| $>D <$&{server_name}> <?> <! AuthInfo> <>
R$* $| <?>$* $: $1 $| $>A <$&{server_addr}> <?> <! AuthInfo> <>
R$* $| <?>$* $: $1 $| <$(access AuthInfo: $: ? $)> <>
R$* $| <?>$* $@ no no authinfo available
R$* $| <$*> <> $# $2

######################################################################
### RateControl:
### Parameters: ignored
### return: $#error or OK
######################################################################
SRateControl
R$* $: <A:$&{client_addr}> <E:>
R$+ $: $>SearchList <! ClientRate> $| $1 <>
R<?> $@ OK
R<$* <TMPF>> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<0> $@ OK no limit
R<$+> $: <$1> $| $(arith l $@ $1 $@ $&{client_rate} $)
R<$+> $| TRUE $#error $@ 4.3.2 $: 421 Connection rate limit exceeded.


######################################################################
### ConnControl:
### Parameters: ignored
### return: $#error or OK
######################################################################
SConnControl
R$* $: <A:$&{client_addr}> <E:>
R$+ $: $>SearchList <! ClientConn> $| $1 <>
R<?> $@ OK
R<$* <TMPF>> $#error $@ 4.3.0 $: "451 Temporary system failure. Please try again later."
R<0> $@ OK no limit
R<$+> $: <$1> $| $(arith l $@ $1 $@ $&{client_connections} $)
R<$+> $| TRUE $#error $@ 4.3.2 $: 421 Too many open connections.





######################################################################
### greet_pause: lookup pause time before 220 greeting
###
### Parameters:
### $1: {client_name}
### $2: {client_addr}
######################################################################
SLocal_greet_pause
Sgreet_pause
R$* $: <$1><?> $| $>"Local_greet_pause" $1
R<$*><?> $| $#$* $#$2
R<$*><?> $| $* $: $1
R$+ $| $+ $: $>D < $1 > <?> <! GreetPause> < $2 >
R $| $+ $: $>A < $1 > <?> <! GreetPause> <> empty client_name
R<?> <$+> $: $>A < $1 > <?> <! GreetPause> <> no: another lookup
R<?> <$*> $# 1000
R<$* <TMPF>> <$*> $@
R<$+> <$*> $# $1
#
######################################################################
######################################################################
#####
##### MAIL FILTER DEFINITIONS
#####
######################################################################
######################################################################

#
######################################################################
######################################################################
#####
##### MAILER DEFINITIONS
#####
######################################################################
######################################################################



##################################################
### Local and Program Mailer specification ###
##################################################

##### $Id: local.m4,v 8.59 2004/11/23 00:37:25 ca Exp $ #####

#
# Envelope sender rewriting
#
SEnvFromL
R<@> $n errors to mailer-daemon
R@ <@ $*> $n temporarily bypass Sun bogosity
R$+ $: $>AddDomain $1 add local domain if needed
R$* $: $>MasqEnv $1 do masquerading

#
# Envelope recipient rewriting
#
SEnvToL
R$+ < @ $* > $: $1 strip host part
R$+ + $* $: < $&{addr_type} > $1 + $2 mark with addr type
R<e s> $+ + $* $: $1 remove +detail for sender
R< $* > $+ $: $2 else remove mark

#
# Header sender rewriting
#
SHdrFromL
R<@> $n errors to mailer-daemon
R@ <@ $*> $n temporarily bypass Sun bogosity
R$+ $: $>AddDomain $1 add local domain if needed
R$* $: $>MasqHdr $1 do masquerading

#
# Header recipient rewriting
#
SHdrToL
R$+ $: $>AddDomain $1 add local domain if needed
R$* < @ *LOCAL* > $* $: $1 < @ $j . > $2

#
# Common code to add local domain name (only if always-add-domain)
#
SAddDomain

Mlocal, P=/usr/sbin/sensible-mda, F=lsDFMAw5:/|@qPn9S, S=EnvFromL/HdrFromL, R=EnvToL/HdrToL,
T=DNS/RFC822/X-Unix,
A=sensible-mda $g $u $h ${client_addr}
Mprog, P=/bin/sh, F=lsDFMoqeu9, S=EnvFromL/HdrFromL, R=EnvToL/HdrToL, D=$z:/,
T=X-Unix/X-Unix/X-Unix,
A=sh -c $u

#####################################
### SMTP Mailer specification ###
#####################################

##### $Id: smtp.m4,v 8.65 2006/07/12 21:08:10 ca Exp $ #####

#
# common sender and masquerading recipient rewriting
#
SMasqSMTP
R$* < @ $* > $* $@ $1 < @ $2 > $3 already fully qualified
R$+ $@ $1 < @ *LOCAL* > add local qualification

#
# convert pseudo-domain addresses to real domain addresses
#
SPseudoToReal

# pass <route-addr>s through
R< @ $+ > $* $@ < @ $1 > $2 resolve <route-addr>

# output fake domains as user%fake@relay

# do UUCP heuristics; note that these are shared with UUCP mailers
R$+ < @ $+ .UUCP. > $: < $2 ! > $1 convert to UUCP form
R$+ < @ $* > $* $@ $1 < @ $2 > $3 not UUCP form

# leave these in .UUCP form to avoid further tampering
R< $&h ! > $- ! $+ $@ $2 < @ $1 .UUCP. >
R< $&h ! > $-.$+ ! $+ $@ $3 < @ $1.$2 >
R< $&h ! > $+ $@ $1 < @ $&h .UUCP. >
R< $+ ! > $+ $: $1 ! $2 < @ $Y > use UUCP_RELAY
R$+ < @ $~[ $* : $+ > $@ $1 < @ $4 > strip mailer: part
R$+ < @ > $: $1 < @ *LOCAL* > if no UUCP_RELAY


#
# envelope sender rewriting
#
SEnvFromSMTP
R$+ $: $>PseudoToReal $1 sender/recipient common
R$* :; <@> $@ list:; special case
R$* $: $>MasqSMTP $1 qualify unqual'ed names
R$+ $: $>MasqEnv $1 do masquerading


#
# envelope recipient rewriting --
# also header recipient if not masquerading recipients
#
SEnvToSMTP
R$+ $: $>PseudoToReal $1 sender/recipient common
R$+ $: $>MasqSMTP $1 qualify unqual'ed names
R$* < @ *LOCAL* > $* $: $1 < @ $j . > $2

#
# header sender and masquerading header recipient rewriting
#
SHdrFromSMTP
R$+ $: $>PseudoToReal $1 sender/recipient common
R:; <@> $@ list:; special case

# do special header rewriting
R$* <@> $* $@ $1 <@> $2 pass null host through
R< @ $* > $* $@ < @ $1 > $2 pass route-addr through
R$* $: $>MasqSMTP $1 qualify unqual'ed names
R$+ $: $>MasqHdr $1 do masquerading


#
# relay mailer header masquerading recipient rewriting
#
SMasqRelay
R$+ $: $>MasqSMTP $1
R$+ $: $>MasqHdr $1

Msmtp, P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
T=DNS/RFC822/SMTP,
A=TCP $h
Mesmtp, P=[IPC], F=mDFMuXa, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
T=DNS/RFC822/SMTP,
A=TCP $h
Msmtp8, P=[IPC], F=mDFMuX8, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
T=DNS/RFC822/SMTP,
A=TCP $h
Mdsmtp, P=[IPC], F=mDFMuXa%, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990,
T=DNS/RFC822/SMTP,
A=TCP $h
Mrelay, P=[IPC], F=mDFMuXa8, S=EnvFromSMTP/HdrFromSMTP, R=MasqSMTP, E=\r\n, L=2040,
T=DNS/RFC822/SMTP,
A=TCP $h