RHEL6 postfix+dovecot 邮件服务配置

ew21w

环境：RHEL6.6

软件：postfix-3.0.0  bind-9.8.2-0.30 mysql-5.5.42  dovecot-2.0.9-7

软件源：本地源，epel源，remi源

邮件服务器IP：192.168.1.110

主机名为mail.mingxiao.info

客户端   IP 192.168.1.77  WinXP,Outlook Express收发邮件

请确保selinux处于permissive状态，防火墙处于关闭状态。

添加几个测试用户，为了测试方便，密码和用户名相同

[iyunv@mail ~]# useradd jianpan

[iyunv@mail ~]# passwd jianpan

[iyunv@mail ~]# useradd shubiao

[iyunv@mail ~]# passwd shubiao

步骤1：配置DNS

[iyunv@mail ~]# yum install bind bind-utils

编辑/etc/named.conf，将options内去掉 listen-on port 53 { 127.0.0.1; }; listen-on-v6 port 53 { ::1; };这两项，如下：

options {
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        allow-query     { localhost; };
        recursion yes;
        ......

编辑/etc/named.rfc1912.zones，在尾部添加如下内容：

zone "mingxiao.info" IN {
        type master;
        file "mingxiao.info.zone";
        allow-update { none; };
        allow-transfer { none; };
};
zone "1.168.192.in-addr.arpa" IN {
        type master;
        file "192.168.1.zone";
        allow-update { none; };
        allow-transfer { none; };
};

新建/var/named/mingxiao.info.zone  并添加如下内容：

$TTL 86400
@       IN      SOA     ns.mingxiao.info        admin.mingxiao.info. (
                        20150526
                        2H
                        10M
                        3D
                        1D )
        IN      NS      ns
        IN      MX 10   mail
ns      IN      A       192.168.1.110
mail    IN      A       192.168.1.110

新建/var/named/192.168.1.zone  并添加如下内容

$TTL 86400
@       IN      SOA     ns.mingxiao.info        admin.mingxiao.info. (
                        20150526
                        2H
                        10M
                        3D
                        1D )
        IN      NS      ns.mingxiao.info.
110      IN      PTR     ns.mingxiao.info.
110      IN      PTR    mail.mingxiao.info.

更改权限及属组

[iyunv@mail named]# chmod 640 /var/named/mingxiao.info.zone

[iyunv@mail named]# chmod 640 /var/named/192.168.1.zone

[iyunv@mail named]# chgrp named 192.168.1.zone mingxiao.info.zone


DNS指向自己主机

[iyunv@mail named]# echo "nameserver 192.168.1.110" > /etc/resolv.conf


启动named，并测试解析是否正常，请确保解析正常。

[iyunv@mail named]# service named start

[iyunv@mail named]# dit -t A mail.mingxiao.info

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6 <<>> -t A mail.mingxiao.info
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56173
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;mail.mingxiao.info. IN A

;; ANSWER SECTION:
mail.mingxiao.info. 86400 IN A 192.168.1.110

;; AUTHORITY SECTION:
mingxiao.info. 86400 IN NS ns.mingxiao.info.

;; ADDITIONAL SECTION:
ns.mingxiao.info. 86400 IN A 192.168.1.110

;; Query time: 0 msec
;; SERVER: 192.168.1.110#53(192.168.1.110)
;; WHEN: Mon Mar 30 16:19:25 2015
;; MSG SIZE  rcvd: 85


步骤2：安装mysql

[iyunv@mail ~]# yum install mysql-server mysql-devel

[iyunv@mail ~]# service mysqld restart


步骤3：安装postfix

编译安装postfix，首先关闭原先postfix，并改名即可。

[iyunv@mail ~]# service postfix stop

Shutting down postfix:

[iyunv@mail ~]# mv /etc/init.d/postfix /etc/init.d/postfix.old

删除原来的postfix用户及组,并重新添加。

[iyunv@mail ~]# userdel del postfix

[iyunv@mail ~]# groupadd -g 2525 postfix

[iyunv@mail ~]# useradd -g postfix -u 2525 -s /sbin/nologin -M postfix


[iyunv@mail ~]# tar xf postfix-3.0.0.tar.gz

[iyunv@mail ~]# cd postfix-3.0.0

make makefiles 'CCARGS=-DHAS_MYSQL -I/usr/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/include/sasl  -DUSE_TLS '

'AUXLIBS=-L/usr/lib/mysql -lmysqlclient -lz -lm -L/usr/lib/sasl2 -lsasl2  -lssl -lcrypto'

make

make install

注意：make install 过程中会让您输入一些路径，全部敲回车使用默认即可。


提供SysV风格的服务启动脚本，新建/etc/init.d/postfix文件，并加入以下内容：

#!/bin/bash
#
# postfix      Postfix Mail Transfer Agent
#
# chkconfig: 2345 80 30
# description: Postfix is a Mail Transport Agent, which is the program \
#              that moves mail from one machine to another.
# processname: master
# pidfile: /var/spool/postfix/pid/master.pid
# config: /etc/postfix/main.cf
# config: /etc/postfix/master.cf
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ $NETWORKING = "no" ] && exit 3
[ -x /usr/sbin/postfix ] || exit 4
[ -d /etc/postfix ] || exit 5
[ -d /var/spool/postfix ] || exit 6
RETVAL=0
prog="postfix"
start() {
# Start daemons.
echo -n $"Starting postfix: "
        /usr/bin/newaliases >/dev/null 2>&1
/usr/sbin/postfix start 2>/dev/null 1>&2 && success || failure $"$prog start"
RETVAL=$?
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/postfix
        echo
return $RETVAL
}
stop() {
  # Stop daemons.
echo -n $"Shutting down postfix: "
/usr/sbin/postfix stop 2>/dev/null 1>&2 && success || failure $"$prog stop"
RETVAL=$?
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/postfix
echo
return $RETVAL
}
reload() {
echo -n $"Reloading postfix: "
/usr/sbin/postfix reload 2>/dev/null 1>&2 && success || failure $"$prog reload"
RETVAL=$?
echo
return $RETVAL
}
abort() {
/usr/sbin/postfix abort 2>/dev/null 1>&2 && success || failure $"$prog abort"
return $?
}
flush() {
/usr/sbin/postfix flush 2>/dev/null 1>&2 && success || failure $"$prog flush"
return $?
}
check() {
/usr/sbin/postfix check 2>/dev/null 1>&2 && success || failure $"$prog check"
return $?
}
restart() {
stop
start
}
# See how we were called.
case "$1" in
  start)
start
;;
  stop)
stop
;;
  restart)
stop
start
;;
  reload)
reload
;;
  abort)
abort
;;
  flush)
flush
;;
  check)
check
;;
  status)
  status master
;;
  condrestart)
[ -f /var/lock/subsys/postfix ] && restart || :
;;
  *)
echo $"Usage: $0 {start|stop|restart|reload|abort|flush|check|status|condrestart}"
exit 1
esac
exit $?
# END

[iyunv@mail postfix-3.0.0]# chmod +x /etc/init.d/postfix

[iyunv@mail postfix-3.0.0]# chkconfig postfix on

[iyunv@mail postfix-3.0.0]# service postfix start

Starting postfix:                                          [FAILED]

出现错误，首先查看日志

[iyunv@mail postfix-3.0.0]# tail /var/log/maillog

Mar 30 16:46:26 mail postfix/postfix-script[28627]: warning: not owned by postfix: /var/lib/postfix/./master.lock

Mar 30 16:46:26 mail postfix/postfix-script[28639]: starting the Postfix mail system

Mar 30 16:46:26 mail postfix/master[28643]: fatal: open lock file /var/lib/postfix/master.lock: cannot open file: Permission denied

Mar 30 16:46:27 mail postfix/master[28641]: fatal: daemon initialization failure

Mar 30 16:46:28 mail postfix/postfix-script[28644]: fatal: mail system startup failed

解决办法：

[iyunv@mail postfix-3.0.0]# rm -f /var/lib/postfix/./master.lock

[iyunv@mail postfix-3.0.0]# service postfix start

Starting postfix:                                          [  OK  ]

启动成功，查看日志，看有无错误警告信息。

[iyunv@mail ~]# newaliases

编辑/etc/postfix/main.cf配置文件，修改以下内容：

myhostname=mail.mingxiao.info

mydomain=mingxiao.info

myorigin=$mydomain

inet_interfaces=all

mydestination=$myhostname,localhost.$mydomain,localhost,$mydomain,ns.$mydomain

mynetworks=192.168.1.0/24,127.0.0.0/8

[iyunv@mail ~]# service postfix restart

[iyunv@mail ~]# telnet mail.mingxiao.info 25

Trying 192.168.1.110...
Connected to mail.mingxiao.info.
Escape character is '^]'.
220 mail.mingxiao.info ESMTP Postfix
helo mail.mingxiao.info
250 mail.mingxiao.info
mail from:jianpan@mingxiao.info
250 2.1.0 Ok
rcpt to:shubiao@mingxiao.info
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
How are you.
.
250 2.0.0 Ok: queued as 9A07960408
quit
221 2.0.0 Bye
Connection closed by foreign host.

查看日志发送状态信息：可以发现状态是delevered to mailbox,发送成功。

[iyunv@mail ~]# tail /var/log/maillog

Mar 30 17:02:46 mail postfix/local[29129]: 9A07960408: to=<shubiao@mingxiao.info>, relay=local, delay=28, delays=28/0.02/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)

Mar 30 17:02:46 mail postfix/qmgr[29109]: 9A07960408: removed

Mar 30 17:02:49 mail postfix/smtpd[29121]: disconnect from ns.mingxiao.info[192.168.1.110] helo=1 mail=1 rcpt=1 data=1 quit=1 commands=5

切换到shubiao用户

[iyunv@mail ~]# su - shubiao

[shubiao@mail ~]$ mail

Heirloom Mail version 12.4 7/29/08.  Type ? for help.
"/var/spool/mail/shubiao": 1 message 1 new
>N  1 jianpan@mingxiao.inf  Mon Mar 30 17:02  13/503
& 1
Message  1:
From jianpan@mingxiao.info  Mon Mar 30 17:02:46 2015
Return-Path: <jianpan@mingxiao.info>
X-Original-To: shubiao@mingxiao.info
Delivered-To: shubiao@mingxiao.info
Date: Mon, 30 Mar 2015 17:02:18 +0800 (CST)
From: jianpan@mingxiao.info
Status: R
How are you.

可以看到已经收到一封邮件。

在XP上用Outlook Express测试，使用shubiao账号登陆，给jianpan用户发送一封测试邮件：

[iyunv@mail ~]# su - jianpan
[jianpan@mail ~]$ mail   
Heirloom Mail version 12.4 7/29/08.  Type ? for help.
"/var/spool/mail/jianpan": 1 message 1 new
>N  1 hi                    Mon Mar 30 17:25  44/1534  "test"
& 1
Message  1:
From shubiao@mingxiao.info  Mon Mar 30 17:25:58 2015
Return-Path: <shubiao@mingxiao.info>
X-Original-To: jianpan@mingxiao.info
Delivered-To: jianpan@mingxiao.info
From: "hi" <shubiao@mingxiao.info>
To: <jianpan@mingxiao.info>
Subject: test
Date: Mon, 30 Mar 2015 09:25:57 +0800
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0022_01D06ACB.879E7AC0"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.5931
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157
Status: R
Content-Type: text/plain;
charset="gb2312"
Hi.
收信成功，但此时尚不能在windows上收取邮件，远程用户接收邮件需要有MRA(mail retrieval agent)服务器,使用pop3或imap协议接收邮件，因此安装dovecot。

步骤4：安装dovecot
[iyunv@mail ~]# yum install dovecot
编辑/etc/dovecot/dovecot.conf，取消protocol并改为protocols = pop3

[iyunv@mail ~]# telnet mail.mingxiao.info 110
Trying 192.168.1.110...
Connected to mail.mingxiao.info.
Escape character is '^]'.
+OK Dovecot ready.
USER jianpan
+OK
PASS jianpan
Connection closed by foreign host.
出错，查看日志报什么错误
[iyunv@mail ~]# tail /var/log/maillog
Mar 30 17:35:33 mail dovecot: pop3-login: Login: user=<jianpan>, method=PLAIN, rip=192.168.1.110, lip=192.168.1.110, mpid=29824, secured
Mar 30 17:35:33 mail dovecot: pop3(jianpan): Error: user jianpan: Initialization failed: mail_location not set and autodetection failed: Mail storage autodetection failed with home=/home/jianpan
Mar 30 17:35:33 mail dovecot: pop3(jianpan): Error: Invalid user settings. Refer to server log for more information.
解决办法：mail_location没有设置，在配置文件中设置即可，即为邮件存放位置。
[iyunv@mail ~]# vim /etc/dovecot/conf.d/10-mail.conf
mail_location = mbox:~/mail:INBOX=/var/mail/%u

[iyunv@mail ~]# telnet mail.mingxiao.info 110
Trying 192.168.1.110...
Connected to mail.mingxiao.info.
Escape character is '^]'.
+OK Dovecot ready.
USER jianpan
+OK
PASS jianpan
-ERR [IN-USE] Couldn't open INBOX: Internal error occurred. Refer to server log for more information. [2015-03-30 17:38:04]
Connection closed by foreign host.
出错，查看日志，发现是权限问题。
Mar 30 17:38:04 mail dovecot: pop3-login: Login: user=<jianpan>, method=PLAIN, rip=192.168.1.110, lip=192.168.1.110, mpid=29869, secured
Mar 30 17:38:04 mail dovecot: pop3(jianpan): Error: chown(/home/jianpan/mail/.imap/INBOX, -1, 12(mail)) failed: Operation not permitted (egid=500(jianpan), group based on /var/mail/jianpan)
Mar 30 17:38:04 mail dovecot: pop3(jianpan): Error: mkdir(/home/jianpan/mail/.imap/INBOX) failed: Operation not permitted
Mar 30 17:38:04 mail dovecot: pop3(jianpan): Error: Couldn't open INBOX: Internal error occurred. Refer to server log for more information. [2015-03-30 17:38:04]
Mar 30 17:38:04 mail dovecot: pop3(jianpan): Couldn't open INBOX top=0/0, retr=0/0, del=0/0, size=0
解决方法：
[iyunv@mail ~]# vim /etc/dovecot/conf.d/10-mail.conf
mail_access_groups = mail

[iyunv@mail ~]# telnet mail.mingxiao.info 110
Trying 192.168.1.110...
Connected to mail.mingxiao.info.
Escape character is '^]'.
+OK Dovecot ready.
USER jianpan
+OK
PASS jianpan
+OK Logged in.
LIST
+OK 2 messages:
1 1522
2 1526
.
可以使用dovecot接收邮件了。

测试发邮件给shubiao，在windows使用outlook express接收邮件是否成功。
[iyunv@mail postfix-3.0.0]# telnet 192.168.1.110 25
Trying 192.168.1.110...
Connected to 192.168.1.110.
Escape character is '^]'.
220 mail.mingxiao.info ESMTP Postfix
helo mail.mingxiao.info
250 mail.mingxiao.info
mail from:jianpan@mingxiao.info
250 2.1.0 Ok
rcpt to:shubiao@mingxiao.info
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
Hahaa!  
.
在outlook express点击接收所有邮件，发现仍是不允许，查看日志信息。
Mar 30 18:04:42 mail dovecot: pop3-login: Disconnected (tried to use disabled plaintext auth): rip=192.168.1.77, lip=192.168.1.110
Mar 30 18:05:00 mail dovecot: pop3-login: Disconnected (tried to use disabled plaintext auth): rip=192.168.1.77, lip=192.168.1.110
解决办法：编辑/etc/dovecot/conf.d/10-auth.conf，将disable_plaintext_auth = no
默认的是disable_plaintext_auth=yes，如果客户端没有配置使用SSL/TLS，就不得不设置成disable_plaintext_auth=no

重启dovecot服务，重新点击接收所有邮件。接收邮件成功。


步骤5：为postfix开启基于cryus-sasl认证


[iyunv@mail ~]# postconf -a  列出可用的sasl服务的插件类型
cyrus
dovecot

编辑/etc/sysconfig/saslauthd,将MECH=pam改为MECH=shadow
新建/usr/lib/sasl2/smtpd.conf并添加如下内容
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN
log_level: 3

编辑/etc/postfix/main.cf，添加如下内容
############################CYRUS-SASL############################
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_invalid_hostname,reject_non_fqdn_hostname,reject_unknown_sender_domain,reject_non_fqdn_sender,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_pipelining,reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_path = smtpd
smtpd_banner = Welcome to our $myhostname ESMTP

[iyunv@mail ~]# chkconfig saslauthd on
[iyunv@mail ~]# service saslauthd start
[iyunv@mail ~]# testsaslauthd -ushubiao -pjianpan   测试是否成功

步骤6：安装courier-authlib
[iyunv@mail ~]# cd courier-authlib-0.66.1
在安装前，首先要安装libtool-ltdl libtool-ltdl-devel expect否则会出现错误
./configure \
    --prefix=/usr/local/courier-authlib \
    --sysconfdir=/etc \
    --without-authpam \
    --without-authshadow \
    --without-authvchkpw \
    --without-authpgsql \
    --with-authmysql \
    --with-mysql-libs=/usr/lib/mysql \
    --with-mysql-includes=/usr/include/mysql \
    --with-redhat \
    --with-authmysqlrc=/etc/authmysqlrc \
    --with-authdaemonrc=/etc/authdaemonrc \
    --with-mailuser=postfix \
    --with-mailgroup=postfix
make

make install

[iyunv@mail ~]# chmod 755 /usr/local/courier-authlib/var/spool/authdaemon
[iyunv@mail ~]# cp /etc/authdaemonrc.dist /etc/authdaemonrc
[iyunv@mail ~]# cp /etc/authmysqlrc.dist /etc/authmysqlrc

编辑/etc/authdaemonrc文件
authmodulelist="authmysql"
authmodulelistorig="authmysql"
DEBUG_LOGIN=2

编辑/etc/authmysqlrc
MYSQL_SERVER            localhost
MYSQL_USERNAME          extmail
MYSQL_PASSWORD          extmail
MYSQL_SOCKET          /var/lib/mysql/mysql.sock

MYSQL_PORT              3306
MYSQL_DATABASE          extmail
MYSQL_USER_TABLE        mailbox
MYSQL_CRYPT_PWFIELD         password
MYSQL_GID_FIELD         2525
MYSQL_UID_FIELD         2525
MYSQL_LOGIN_FIELD       username
MYSQL_HOME_FIELD        concat('/var/mailbox/',homedir)
MYSQL_NAME_FIELD        concat('/var/mailbox/',maildir)

提供sysv风格启动脚本
[iyunv@mail courier-authlib-0.66.1]# cp courier-authlib.sysvinit /etc/init.d/courier-authlib

[iyunv@mail courier-authlib-0.66.1]# chmod +x /etc/init.d/courier-authlib
[iyunv@mail courier-authlib-0.66.1]# service courier-authlib start

新建虚拟用户目录，并赋予postfix用户权限
[iyunv@mail courier-authlib-0.66.1]# mkdir /var/mailbox
[iyunv@mail courier-authlib-0.66.1]# chown -R postfix /var/mailbox

步骤7：让postfix支持虚拟域和虚拟用户
编辑/usr/lib/sasl2/smtpd.conf，并改为如下内容

pwcheck_method: authdaemond
log_level: 3
mech_list:PLAIN LOGIN
authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket
[iyunv@mail ~]# service saslauthd restart

编辑/etc/postfix/main.cf
########################Virtual Mailbox Settings########################
virtual_mailbox_base = /var/mailbox
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_alias_domains =
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_uid_maps = static:2525
virtual_gid_maps = static:2525
virtual_transport = virtual
##########################QUOTA Settings########################
message_size_limit = 14336000
virtual_mailbox_limit = 20971520

[iyunv@mail ~]# cd extman-1.1/docs/
[iyunv@mail docs]# sed -i 's@TYPE=MyISAM@ENGINE=InnoDB@g' extmail.sql
[iyunv@mail docs]# mysql < extmail.sql
[iyunv@mail docs]# mysql < init.sql
[iyunv@mail docs]# cp mysql_virtual_* /etc/postfix

连接到mysql，授予extmail访问extmail数据库的权限

mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';
Query OK, 0 rows affected (0.00 sec)
mysql> GRANT all privileges on extmail.* TO extmail@127.0.0.1 IDENTIFIED BY 'extmail';
Query OK, 0 rows affected (0.00 sec)

注意：虚拟域和中心域不能同时启用，所以要取消中心域，注释掉/etc/postfix/main.cf中myhostname,mydestination,mydomain,myorigin。

步骤8：配置dovecot

编辑/etc/dovecot/conf.d/10-mail.conf，maillocation改为
mail_location = maildir:/var/mailbox/%d/%n/Maildir
编辑/etc/dovecot/10-auth.conf 取消下行注释
!include auth-sql.conf.ext

编辑/etc/dovecot/conf.d/auth-sql.conf.ext，改为
passdb {
  driver = sql
  args = /etc/dovecot-mysql.conf
}
userdb {
  driver = sql
  args = /etc/dovecot-mysql.conf
}

编辑/etc/dovecot-mysql.conf
driver = mysql
connect = host=localhost dbname=extmail user=extmail password=extmail
default_pass_scheme = CRYPT
password_query = SELECT username AS user,password AS password FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, uidnumber AS uid, gidnumber AS gid FROM mailbox WHERE username = '%u

步骤9：安装extmail-1.2
[iyunv@mail ~]# mkdir -pv /var/www/extsuite
[iyunv@mail ~]# mv extmail-1.2 /var/www/extsuite/extmail
[iyunv@mail ~]# cp /var/www/extsuite/extmail/webmail.cf.default /var/www/extsuite/extmail/webmail.cf
编辑/var/www/extsuite/extmail/webmail.cf
SYS_USER_LANG = zh_CN
SYS_MAILDIR_BASE = /var/mailbox
SYS_MYSQL_USER = extmail
SYS_MYSQL_PASS = extmail
SYS_AUTHLIB_SOCKET = /usr/local/courier-authlib/var/spool/authdaemon/socket
[iyunv@mail ~]# chown -R postfix.postfix /var/www/extsuite/extmail/cgi/

步骤10：安装extman-1.1
[iyunv@mail ~]# mv extman-1.1 /var/www/extsuite/extman
[iyunv@mail ~]# cp /var/www/extsuite/extman/webman.cf.default /var/www/extsuite/extman/webman.cf
编辑/var/www/extsuite/extman/webmail.cf
SYS_MAILDIR_BASE = /var/mailbox
SYS_DEFAULT_UID = 2525           postfix的UID和GID
SYS_DEFAULT_GID = 2525
SYS_MYSQL_USER = extmail      
SYS_MYSQL_PASS = extmail
SYS_CAPTCHA_ON = 0
[iyunv@mail ~]# chown -R postfix.postfix /var/www/extsuite/extmail/cgi/

[iyunv@mail ~]# mkdir -pv /tmp/extman
[iyunv@mail ~]# chown postfix.postfix /tmp/extman/

步骤11：Apache安装配置
[iyunv@mail ~]# yum install httpd
编辑/etc/httpd/conf/httpd.conf
User postfix    以postfix用户,postfix组运行apache进程
Group postfix

<VirtualHost *:80>
ServerName mail.magedu.com
DocumentRoot /var/www/extsuite/extmail/html/
ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi
Alias /extmail /var/www/extsuite/extmail/html
ScriptAlias /extman/cgi /var/www/extsuite/extman/cgi
Alias /extman /var/www/extsuite/extman/html
</VirtualHost>

[iyunv@mail ~]# service httpd start

浏览器输入192.168.1.110/extmail/
有错误提示
Unix::Syslog not found, please install it first! (in cleanup) Undefined subroutine &Ext::Logger::do_closelog called at /var/www/extsuite/extmail/libs/Ext/Logger.pm line 86.
解决：extmail将会用到perl的Unix::syslogd功能,编译安装即可
[iyunv@mail ~]# tar xf Unix-Syslog-1.1.tar.gz
[iyunv@mail ~]# cd Unix-Syslog-1.1
[iyunv@mail Unix-Syslog-1.1]# perl Makefile.PL
[iyunv@mail Unix-Syslog-1.1]# make
[iyunv@mail Unix-Syslog-1.1]# make install

浏览器192.168.1.110/extmail/
新建一个mingxiao.info域，新建两个用户xiaoming,xiaohong，


互发邮件成功，webmail基本功能已经实现。