基于虚拟用户的邮件系统配置

实验说明：

操作系统：redhat5.8_x64bit

由postfix+ sasl + courier-authlib + MySQL(实现了虚拟用户、虚拟域) + dovecot + Webmail {extmail(extmain)} 组成的虚拟用户。

需要准备以下软件包：

postfix-2.9.6.tar.gz

courier-authlib-0.64.0.tar.bz2

extmail-1.2.tar.gz

extman-1.1.tar.gz

Unix-Syslog-0.100.tar.gz

提示：以下实验都在一台机器上配置。

一、安装Bind97

1、首先卸载bind93

#rpm -qa | grep bind  /*查看是否安装Bind93
bind-libs-9.3.6.e15_6.1
bind-utils-9.3.6-20.P1.e15
#rpm -e bind-libs bind-utils  /卸载bind93

2、安装bind97

#yum install bind97 bind97-utils

3、简单修改named.conf配置文件

#vim /etc/named.conf  -->删除下面3行内容
listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
allow-query {localhost;};

4、编辑named.rfc1912.zones文件定义正向和反向区域。

zone "zengx.com" IN {type master;file "zengx.com.zone";allow-update { none; };  //不让任何人更新allow-transfer { none; };  //不让任何人传输
};
zone "3.168.192.in-addr.arpa" IN {type master;file "192.168.3.zone";allow-update { none; };allow-transfer { none; };
};
[root@localhost ~]# named-checkconf /etc/named.conf

5、创建区域文件

#cd /var/named/
#vim zengx.com.zone
$TTL 86400
@      IN   SOA  ns.magedu.com. admin.magedu.com. (20151130012H  //刷新时间10M  //重试时间3D   //过期时间1D)  //否定TTL值IN   NS   nsIN   MX  10 mail
ns     IN   A    192.168.3.3
mail   IN   A    192.168.3.3
www    IN   A    1192.168.3.3
#vim 192.168.3.zone
$TTL 86400
@      IN   SOA  ns.magedu.com. admin.magedu.com. (20130415012H10M3D1D)IN   NS   ns.magedu.com.
3      IN   PTR  ns.magedu.com.
3      IN   PTR  mail.magedu.com.
3      IN   PTR  www.magedu.com.
:wq 保存退出
# named-checkzone "zengx.com.zone" zengx.com.zone
zone zengx.com.zone/IN: loaded serial 2015113001
OK
# named-checkzone "192.168.3.in-addr-arpa" 192.168.3.zonezone 192.168.3.in-addr-arpa/IN: loaded serial 2015113001
OK

6、修改权限

# chgrp named zengx.com.zone 192.168.3.zone
# chgrp named zengx.com.zone 192.168.3.zone

7、启动DNS

# service named start
Starting named:                                            [  OK  ]
# netstat -tunlp | grep named   //查看端口是否被监听
tcp        0      0 192.168.3.3:53          0.0.0.0:*         LISTEN      4189/named
tcp        0      0 127.0.0.1:53            0.0.0.0:*         LISTEN      4189/named
tcp        0      0 127.0.0.1:953           0.0.0.0:*         LISTEN      4189/named
tcp        0      0 ::1:953                 :::*              LISTEN      4189/named
udp        0      0 192.168.3.3:53         0.0.0.0:*                      4189/named
udp        0      0 127.0.0.1:53           0.0.0.0:*                      4189/named
# chkconfig named on  //设置开机自动启动

8、测试

# vim /etc/resolv.conf  //修改DNS服务IP为192.168.3.3
nameserver 192.168.3.3

# dig -t MX zengx.com @192.168.3.3

; <<>> DiG 9.7.0-P2-RedHat-9.7.0-6.P2.el5_7.4 <<>> -t MX zengx.com @192.168.3.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42182
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2
;; QUESTION SECTION:
;zengx.com.INMX
;; ANSWER SECTION:
zengx.com.    86400  IN MX   10   mail.zengx.com.
;; AUTHORITY SECTION:
zengx.com.    86400  IN  NS  ns.zengx.com.
;; ADDITIONAL SECTION:
mail.zengx.com.  86400  IN  A  192.168.3.3
ns.zengx.com.   86400    IN  A  192.168.3.3
;; Query time: 3 msec
;; SERVER: 192.168.3.3#53(192.168.3.3)
;; WHEN: Mon Nov 30 12:40:20 2015
;; MSG SIZE  rcvd: 97
INA192.168.3.3

# dig -t A mail.zengx.com @192.168.3.3

; <<>> DiG 9.7.0-P2-RedHat-9.7.0-6.P2.el5_7.4 <<>> -t A mail.zengx.com @192.168.3.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46849
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
;; QUESTION SECTION:
;mail.zengx.com.       IN        A
;; ANSWER SECTION:
mail.zengx.com.  86400  IN        A      192.168.3.3
;; AUTHORITY SECTION:
zengx.com.     86400     IN       NS    ns.zengx.com.
;; ADDITIONAL SECTION:
ns.zengx.com.   86400    IN      A     192.168.3.3
;; Query time: 3 msec
;; SERVER: 192.168.3.3#53(192.168.3.3)
;; WHEN: Mon Nov 30 12:42:02 2015
;; MSG SIZE  rcvd: 81

# dig -x 192.168.3.3 @192.168.3.3

; <<>> DiG 9.7.0-P2-RedHat-9.7.0-6.P2.el5_7.4 <<>> -x 192.168.3.3 @192.168.3.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4837
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;3.3.168.192.in-addr.arpa.INPTR
;; ANSWER SECTION:
3.3.168.192.in-addr.arpa.  86400   IN  PTR mail.magedu.com.
3.3.168.192.in-addr.arpa.  86400   IN  PTR ns.magedu.com.
3.3.168.192.in-addr.arpa.  86400   IN  PTR  www.magedu.com.
;; AUTHORITY SECTION:
3.168.192.in-addr.arpa.  86400  IN  NS  ns.magedu.com.
;; Query time: 4 msec
;; SERVER: 192.168.3.3#53(192.168.3.3)
;; WHEN: Mon Nov 30 12:43:10 2015
;; MSG SIZE  rcvd: 120

9、修改主机名

#vim /etc/sysconfig/network
HOSTNAME=mail.zengx.com
#hostname mail.zengx.com   //立即生效
#vim /etc/hosts
192.168.3.3   mail.zengx.com
# ping mail.zengx.com
PING mail.zengx.com (192.168.3.3) 56(84) bytes of data.
64 bytes from ns.magedu.com (192.168.3.3): icmp_seq=1 ttl=64 time=0.028 ms
64 bytes from ns.magedu.com (192.168.3.3): icmp_seq=2 ttl=64 time=0.049 ms
64 bytes from ns.magedu.com (192.168.3.3): icmp_seq=3 ttl=64 time=0.047 ms

二、安装MySQL

1、安装前确保以下开发库和工具已经安装。

Development Libraries

Development Tools

Redhat6的开发软件包：

Development Tools

Server Platform Development

Desktop Platform Development

2、安装mysql

#yum install mysql-server mysql-devel

#service mysqld start

#chkconfig mysqld on

三、安装Postfix

下载postfix-2.9.6.tar.gz

1)卸载系统自带的sendmail

#service sendmail stop

#chkconfig sendmail off

# yum list all | grep sendmail

sendmail.x86_64                         8.13.8-8.1.el5_7          installed

# rpm -e sendmail --nodeps

2)创建postfix用户和组

#groupadd -g 2525 postfix  //ID号要大于1000

#useradd -g postfix -u 2525 -s /sbin/nologin -M postfix

#groupadd -g 2526 postdrop

#useradd -g postdrop -u 2526 -s /sbin/nologin -M postdrop

3)确认sasl软件包是否安装及位置

#yum list all | grep sasl

cryus-sasl-devel.*    -->确定这两个包安装了。

cryus-sasl-plain.*

# rpm -ql cyrus-sasl-devel -->查看sasl安装位置

/usr/include/sasl

/usr/lib64/libsasl2.a

/usr/lib64/libsasl2.so

/usr/lib/libsasl2.a

/usr/lib/libsasl2.so

......省略

#cd /usr/lib64/sas12

#ls

libanonymous.la         liblogin.so.2       libsasldb.la

libanonymous.so         liblogin.so.2.0.22  libsasldb.so

libanonymous.so.2       libplain.la         libsasldb.so.2

libanonymous.so.2.0.22  libplain.so         libsasldb.so.2.0.22

liblogin.la             libplain.so.2

liblogin.so             libplain.so.2.0.22

4)解压安装postfix-2.9.6.tar.gz

#tar -zxvf postfix-2.9.6.tar.gz

#cd postfix-2.9.6

#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/lib64/sasl2 -lsasl2  -lssl -lcrypto'

#make

#make install

按照以下的提示输入相关的路径([]号中的是缺省值，”]”后的是输入值，省略的表示采用默认值)

install_root: [/] /

tempdir: [/root/postfix-2.9.6]

config_directory: [/etc/postfix]

command_directory: [/usr/sbin]

daemon_directory: [/usr/libexec/postfix]

data_directory: [/var/lib/postfix]

html_directory: [no]

mail_owner: [postfix]

mailq_path: [/usr/bin/mailq]

manpage_directory: [/usr/local/man]

newaliases_path: [/usr/bin/newaliases]

queue_directory: [/var/spool/postfix]

readme_directory: [no]

sendmail_path: [/usr/sbin/sendmail]

setgid_group: [postdrop]

为postfix提供SysV服务脚本/etc/init.d/postfix，内容如下(#END 之前)：

为postfix提供SysV服务脚本/etc/init.d/postfix，内容如下(#END 之前)：

vim /etc/init.d/postfix

#!/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

#chmod +x /etc/init.d/postfix

#chkconfig --add postfix

#chkconfig --list postfix

生成别名二进制文件：

# newaliases

确保在/etc/下有aliases.db文件

#ls /etc/aliases.db

编辑main.cf

#vim /etc/postfix/main.cf

myhostname = mail.zengx.com

mydomain = zengx.com

myorigin = $mydomain

inet_interfaces = all

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

mynetworks = 192.168.3.0/24,127.0.0.0/8

:wq 保存退出

#service postfix start  //启动postfix

#tail /var/log/maillog    //查看postfix启动过程初始化信息

Nov 30 14:22:42 localhost postfix/postfix-script[7568]: starting the Postfix mail system

Nov 30 14:22:42 localhost postfix/master[7569]: daemon started -- version 2.9.6, configuration /etc/postfix

#netstat -tnlp   //查看25号端口是否监听

tcp        0      0 0.0.0.0:25         0.0.0.0:*           LISTEN      7569/master

5)测试

/*添加两个用户*/

#useradd openstack

#useradd hadoop

# telnet mail.zengx.com 25

Trying 192.168.3.3...

Connected to mail.zengx.com (192.168.3.3).

Escape character is '^]'.

220 mail.zengx.com ESMTP Postfix

ehlo mail.zengx.com

250-mail.zengx.com

250-PIPELINING

250-SIZE 10240000

250-VRFY

250-ETRN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

mail from:root@zengx.com

250 2.1.0 Ok

rcpt to:hadoop@zengx.com

250 2.1.5 Ok

data

354 End data with <CR><LF>.<CR><LF>

Subject:hello

hello

.

250 2.0.0 Ok: queued as BBD711A1002B

quit

221 2.0.0 Bye

# tail /var/log/maillog

localhost postfix/qmgr[7571]: BBD711A1002B: from=<root@zengx.com>, size=325, nrcpt=1 (queue active)

localhost postfix/local[7853]: BBD711A1002B: to=<hadoop@zengx.com>, relay=local, delay=58, delays=58/0/0/0, dsn=2.0.0, status=sent (delivered to mailbox)

localhost postfix/qmgr[7571]: BBD711A1002B: removed

localhost postfix/smtpd[7842]: disconnect from mail.zengx.com[192.168.3.3]

下面使用WindowsXP测试：

Outlook来给openstack发一封邮件：

opstack用户查看是否收到邮件：

[openstack@mail ~]$ mail

Mail version 8.1 6/6/93.  Type ? for help.

"/var/spool/mail/openstack": 2 messages 1 new 2 unread

U  1 hadoop@zengx.com      Mon Nov 30 15:44  45/1534  "TEST"

>N  2 hadoop@zengx.com      Mon Nov 30 15:50  44/1586  "TEST Hello"

&

四、安装dovecot 

1、rpm包来安装dovecot

#yum install dovecot

2、编辑/etc/dovecot.conf文件

#vim /etc/dovecot.conf

protocols = pop3    //改成支持pop3协议

3、启动dovecot

#service dovecot start

#chkconfig dovecot on

#netstat -tnlp

tcp        0      0 :::110           :::*           LISTEN      8116/dovecot

4、测试是否可以接收邮件

# telnet mail.zengx.com 110

Trying 192.168.3.3...

Connected to mail.zengx.com (192.168.3.3).

Escape character is '^]'.

+OK Dovecot ready.

USER openstack   //用户名

+OK

PASS openstack   //密码

+OK Logged in.

LIST

+OK 1 messages:

1 1517

.

mutt命令：字符界面收发邮件

mutt -f PROTOCOL://username@magedu.com@172.16.100.1

mutt -f pop://openstack@mail.magedu.com

五、启用SASL

1、编辑saslauthd

#vim /etc/sysconfig/saslauthd

MECH=shadow

:wq 保存退出

2、启动saslauthd

#service saslauthd start

#chkconfig saslauthd on

# testsaslauthd -uhadoop -phadoop

0: OK "Success."

3、编辑smtpd.conf

# vim /usr/lib64/sasl2/smtpd.conf

log_level:3     //测试时候可以打开，方便排查错误。

pwcheck_method:saslauthd

memch_list:PLAIN LOGIN

:wq 保存退出

#service saslauthd restart  //重启saslauthd

4、编辑postfix配置文件

#vim /etc/postfix/main.cf   //修改和添加以下内容

mynetworks = 127.0.0.0/8

############################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,Warning: Version not Available!

# service postfix restart  //重启postfix

5、测试

客户端的Windows XP：192.168.3.4

使用Outlook给openstack发邮件：

点击“发送”，提示如下错误：

解决方法：客户端打开身份验证才能发送，如下图：

再点击发送全部邮件：

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

Nov 30 20:40:46 mail postfix/smtpd[4783]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled

Nov 30 20:40:46 mail postfix/smtpd[4783]: connect from unknown[192.168.3.4]

Nov 30 20:40:46 mail postfix/smtpd[4783]: 1BC691A10035: client=unknown[192.168.3.4], sasl_method=LOGIN, sasl_username=hadoop@mail.zengx.com

Nov 30 20:40:46 mail postfix/cleanup[4787]: 1BC691A10035: message-id=<D35D7372E2E54C319645CED292B51968@zx5e0f057a8636>

Nov 30 20:40:46 mail postfix/qmgr[4715]: 1BC691A10035: from=<hadoop@zengx.com>, size=1417, nrcpt=1 (queue active)

Nov 30 20:40:46 mail postfix/smtpd[4783]: disconnect from unknown[192.168.3.4]

Nov 30 20:40:46 mail postfix/local[4789]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled

Nov 30 20:40:46 mail postfix/local[4789]: 1BC691A10035: to=<openstack@zengx.com>, relay=local, delay=0.16, delays=0.06/0.01/0/0.08, dsn=2.0.0, status=sent (delivered to mailbox)

Nov 30 20:40:46 mail postfix/qmgr[4715]: 1BC691A10035: removed

以上完成Postfix +dovecot + SASL。

六、安装Courier authentication library

1、courier简介

courier-authlib是Courier组件中的认证库，它是courier组件中一个独立的子项目，用于为Courier的其它组件提供认证服务。其认证功能通常包括验正登录时的帐号和密码、获取一个帐号相关的家目录或邮件目录等信息、改变帐号的密码等。而其认证的实现方式也包括基于PAM通过/etc/passwd和/etc/shadow进行认证，基于GDBM或DB进行认证，基于LDAP/MySQL/PostgreSQL进行认证等。因此，courier-authlib也常用来与courier之外的其它邮件组件(如postfix)整合为其提供认证服务。

备注：在RHEL5上要使用0.64.0及之前的版本，否则，可能会由于sqlite版本过低问题导致configure检查无法通过或编译无法进行。

2、安装

接下来开始编译安装

#yum list all | grep ltdl //确认是否安装,否则安装

#yum install libtool-ltdl libtool-ltdl-devel  //安装ltdl

#yum install expect  //这个也需要安装好

# tar jxvf courier-authlib-0.64.0.tar.bz2

# cd courier-authlib-0.64.0

#./configure \

--prefix=/usr/local/courier-authlib \

--sysconfdir=/etc \

--without-authpam \

--without-authshadow \

--without-authvchkpw \

--without-authpgsql \

--with-sqlite-libs=/usr/lib64 \

--with-sqlite-includes=/usr/include \

--with-authmysql \

--with-mysql-libs=/usr/lib64/mysql \

--with-mysql-includes=/usr/include/mysql \

--with-redhat \  -->不是红帽系统，这个就不需要。

--with-authmysqlrc=/etc/authmysqlrc \

--with-authdaemonrc=/etc/authdaemonrc \

--with-mailuser=postfix \

--with-mailgroup=postfix \

--with-ltdl-lib=/usr/lib64 \

--with-ltdl-include=/usr/include

#make

#make install

备注：可以使用--with-authdaemonver=/var/spool/authdaemon选项指定进程套接字目录路径。

# chmod 755 /usr/local/courier-authlib/var/spool/authdaemon

# cp /etc/authdaemonrc.dist  /etc/authdaemonrc

# cp /etc/authmysqlrc.dist  /etc/authmysqlrc

修改/etc/authdaemonrc 文件

authmodulelist="authmysql"

authmodulelistorig="authmysql"

daemons=10

DEBUG_LOGIN=2  //调试时候，打开这个选项。

3、配置其通过mysql进行邮件帐号认证

编辑/etc/authmysqlrc 为以下内容，其中2525，2525 为postfix 用户的UID和GID。

MYSQL_SERVER localhost

MYSQL_PORT 3306                   (指定你的mysql监听的端口，这里使用默认的3306)

MYSQL_USERNAME  extmail      (这时为后文要用的数据库的所有者的用户名)

MYSQL_PASSWORD extmail        (密码)

MYSQL_SOCKET  /var/lib/mysql/mysql.sock

MYSQL_DATABASE  extmail

MYSQL_USER_TABLE  mailbox

MYSQL_CRYPT_PWFIELD  password

MYSQL_UID_FIELD  '2525'

MYSQL_GID_FIELD  '2525'

MYSQL_LOGIN_FIELD  username

MYSQL_HOME_FIELD  concat('/var/mailbox/',homedir)

MYSQL_NAME_FIELD  name

MYSQL_MAILDIR_FIELD  concat('/var/mailbox/',maildir)

4、提供SysV服务脚本

# cd courier-authlib-0.64.0

# cp courier-authlib.sysvinit /etc/rc.d/init.d/courier-authlib

# chmod 755 /etc/init.d/courier-authlib

# chkconfig --add courier-authlib

# chkconfig --level 2345 courier-authlib on

# echo "/usr/local/courier-authlib/lib/courier-authlib" >> /etc/ld.so.conf.d/courier-authlib.conf

# ldconfig -v

# service courier-authlib start   (启动服务)

Starting Courier authentication services: authdaemond

#ps aux | grep auth

5、配置postfix和courier-authlib

新建虚拟用户邮箱所在的目录，并将其权限赋予postfix用户：

#mkdir -pv /var/mailbox

#chown -R postfix /var/mailbox

接下来重新配置SMTP 认证，编辑 /usr/lib64/sasl2/smtpd.conf ，确保其为以下内容：

pwcheck_method: authdaemond

log_level: 3

mech_list:PLAIN LOGIN

authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket

七、让postfix支持虚拟域和虚拟用户

1、编辑/etc/postfix/main.cf，添加如下内容：

########################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

#postconf -n  //检查配置文件

注意：这个时候不能启动postfix服务！！！

2、安装httpd

#yum install httpd

3、使用extman源码目录下docs目录中的extmail.sql和init.sql建立数据库：

# tar zxvf  extman-1.1.tar.gz

# cd extman-1.1/docs

# mysql -u root -p < extmail.sql

# mysql -u root -p <init.sql

# cp mysql*  /etc/postfix/

3、授予用户extmail访问extmail数据库的权限

mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';

mysql> GRANT all privileges on extmail.* TO extmail@127.0.0.1 IDENTIFIED BY 'extmail';

4、编辑main.cf -->注释下面的内容

#myhostname = mail.zengx.com

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

#mydomain = zengx.com

#myorigin = $mydomain

#service postfix restart //启动postfix服务

[root@mail ~]# telnet 192.168.3.3 25 //测试是否可以认证

Trying 192.168.3.3...

Connected to mail.zengx.com (192.168.3.3).

Escape character is '^]'.

220 Welcome to our mail.zengx.com ESMTP,Warning: Version not Available!

EHLO mail.zengx.com

250-mail.zengx.com

250-PIPELINING

250-SIZE 14336000

250-VRFY

250-ETRN

250-AUTH PLAIN LOGIN

250-AUTH=PLAIN LOGIN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

mail from:root@zengx.com

250 2.1.0 Ok

rcpt to:hadoop@zengx.com

554 5.7.1 <hadoop@zengx.com>: Relay access denied

说明：启用虚拟域以后，需要取消中心域，即注释掉myhostname, mydestination, mydomain, myorigin几个指令；当然，你也可以把mydestionation的值改为你自己需要的。

2、对于MySQL-5.1以后版本，其中的服务脚本extmail.sql执行会有语法错误：可先使用如下命令修改extmail.sql配置文件，然而再执行，修改方法如下:

#sed -i 's@TYPE=MyISAM@ENGINE=InnoDB@g' extmail.sql

八、配置dovecot

# vi /etc/dovecot.conf

mail_location = maildir:/var/mailbox/%d/%n/Maildir

修改以下内容：

auth default {

mechanisms = plain

passdb sql {     -->去掉前面的注释“#”号，添加下面内容

args = /etc/dovecot-mysql.conf

}

userdb sql {   -->去掉前面的注释“#”号，添加下面内容

args = /etc/dovecot-mysql.conf

}

注释以下内容：

#userdb passwd {

...............

}

#userdb passwd {

..........

#}

：wq保存退出

# vim /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'

说明：如果mysql服务器是本地主机，即host=localhost时，如果mysql.sock文件不是默认的/var/lib/mysql/mysql.sock，可以使用host=“sock文件的路径”来指定新位置；例如：使用通用二进制安装MySQL，其sock文件位置为/tmp/mysql.sock,相应地，connect应按如下方式定义：

connect = host=/tmp/mysql.sock dbname=extmail user=extmail password=extmail

接下来启动dovecot服务：

# service dovecot start

# chkconfig dovecot on

九、安装Extmail-1.2

说明：如果extmail的放置路径做了修改，那么配置文件webmail.cf中的/var/www路径必须修改为你所需要的位置。本文使用了默认的/var/www，所以，以下示例中并没有包含路径修改的相关内容。

1、安装

# mkdir -pv /var/www/extsuite

# tar zxvf extmail-1.2.tar.gz

# mv extmail-1.2 /var/www/extsuite/extmail

#cd /var/www/extsuite/extmail

#cp webmail.cf.default  webmail.cf

2、修改主配置文件

#vi /var/www/extsuite/extmail/webmail.cf

部分修改选项的说明：

SYS_MESSAGE_SIZE_LIMIT = 5242880

用户可以发送的最大邮件

SYS_USER_LANG = en_US

语言选项，可改作：

SYS_USER_LANG = zh_CN

SYS_MAILDIR_BASE = /home/domains

此处即为您在前文所设置的用户邮件的存放目录，可改作：

SYS_MAILDIR_BASE = /var/mailbox

SYS_MYSQL_USER = db_user

SYS_MYSQL_PASS = db_pass

以上两句句用来设置连接数据库服务器所使用用户名、密码和邮件服务器用到的数据库，这里修改为：

SYS_MYSQL_USER = extmail

SYS_MYSQL_PASS = extmail

SYS_MYSQL_HOST = localhost

指明数据库服务器主机名，这里默认即可

SYS_MYSQL_TABLE = mailbox

SYS_MYSQL_ATTR_USERNAME = username

SYS_MYSQL_ATTR_DOMAIN = domain

SYS_MYSQL_ATTR_PASSWD = password

以上用来指定验正用户登录里所用到的表，以及用户名、域名和用户密码分别对应的表中列的名称；这里默认即可

SYS_AUTHLIB_SOCKET = /var/spool/authdaemon/socket

此句用来指明authdaemo socket文件的位置，这里修改为：

SYS_AUTHLIB_SOCKET = /usr/local/courier-authlib/var/spool/authdaemon/socket

3、apache相关配置

由于extmail要进行本地邮件的投递操作，故必须将运行apache服务器用户的身份修改为您的邮件投递代理的用户；本例中打开了apache服务器的suexec功能，故使用以下方法来实现虚拟主机运行身份的指定。此例中的MDA为postfix自带，因此将指定为postfix用户：

#vim /etc/httpd/conf/httpd.conf -->修改如下内容

#DocumentRoot "/var/www/html"   //注释中心主机

添加如下内容：行尾添加

<VirtualHost *:80>

ServerName mail.zengx.com

DocumentRoot /var/www/extsuite/extmail/html/

ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi

Alias /extmail /var/www/extsuite/extmail/html

SuexecUserGroup postfix postfix

</VirtualHost>

:wq 保存退出

#httpd -t  -->检查语法

修改 cgi执行文件属主为apache运行身份用户：

# chown -R postfix.postfix /var/www/extsuite/extmail/cgi/

注意：

如果您没有打开apache服务器的suexec功能,也可以使用以下方法解决：

# vim /etc/httpd/httpd.conf

User postfix

Group postfix

<VirtualHost *:80>

ServerName mail.zengx.com

DocumentRoot /var/www/extsuite/extmail/html/

ScriptAlias /extmail/cgi /var/www/extsuite/extmail/cgi

Alias /extmail /var/www/extsuite/extmail/html

</VirtualHost>

#service httpd start //启动httpd服务

测试：打开浏览器输入：http://192.168.3.3/extmail

出现如下提示如下信息：

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.

解决方法如下第4步：

4、依赖关系的解决

extmail将会用到perl的Unix::syslogd功能，您可以去http://search.cpan.org搜索下载原码包进行安装。

# tar zxvf Unix-Syslog-0.100.tar.gz

# cd Unix-Syslog-0.100

# perl Makefile.PL

# make

# make install

再次打开浏览器输入：http://192.168.3.3/extmail，出现如下信息：

5、设置apache开机自动启动

# chkconfig httpd on

十、安装Extman-1.1

1、安装及基本配置

# tar zxvf  extman-1.1.tar.gz
# mv extman-1.1 /var/www/extsuite/extman
修改配置文件以符合本例的需要：
# cp /var/www/extsuite/extman/webman.cf.default  /var/www/extsuite/extman/webman.cf
# vi /var/www/extsuite/extman/webman.cf
SYS_MAILDIR_BASE = /home/domains
此处即为您在前文所设置的用户邮件的存放目录，可改作：
SYS_MAILDIR_BASE = /var/mailbox
SYS_DEFAULT_UID = 1000
SYS_DEFAULT_GID = 1000
此两处后面设定的ID号需更改为前而创建的postfix用户和postfix组的id号，本文使用的是2525，因此，上述两项需要修改为：
SYS_DEFAULT_UID = 2525
SYS_DEFAULT_GID = 2525
修改
SYS_CAPTCHA_ON = 1
为
SYS_CAPTCHA_ON = 0
SYS_MYSQL_USER = webman
SYS_MYSQL_PASS = webman
修改为：
SYS_MYSQL_USER = extmail
SYS_MYSQL_PASS = extmail
如果SYS_MYSQL_USER没有使用extmail，而使用默认的webman,需要登录mysql，授权webman权限。操作如下：
这里使用默认的webman，所以创建webman用户，如下操作：
#mysql -uroot -p
mysql>GRANT ALL PRIVILEGES ON extmail.* TO webman@localhost IDENTIFIED BY 'webman';
mysql>GRANT ALL PRIVILEGES ON extmail.* TO webman@127.0.0.1 IDENTIFIED BY 'webman';
mysql>FLUSH PRIVILEGES;

而后修改cgi目录的属主：

# chown -R postfix.postfix /var/www/extsuite/extman/cgi/

在apache的主配置文件中Extmail的虚拟主机部分，添加如下两行：

#vim /etc/httpd/conf/httpd.conf
<VirtualHost *:80>
...........
........... 省略
ScriptAlias /extman/cgi /var/www/extsuite/extman/cgi
Alias /extman /var/www/extsuite/extman/html
</VirtualHost>

创建其运行时所需的临时目录，并修改其相应的权限：

#mkdir  -pv  /tmp/extman
#chown postfix.postfix  /tmp/extman
#service httpd restart

好了，到此为止，重新启动apache服务器后，您的Webmail和Extman已经可以使用了，可以在浏览器中输入指定的虚拟主机的名称进行访问，如下：

http://172.16.100.1/extmail 出现如下示图：

选择登录邮箱管理：点击“登录”

跳转到：如下页面

http://172.16.100.1/extman  出现如下示图：

选择管理即可登入extman进行后台管理了。默认管理帐号为：root@extmail.org  密码为：extmail*123* 出现如下页面：

说明：

(1) 如果您安装后无法正常显示校验码，安装perl-GD模块会解决这个问题。如果想简单，您可以到以下地址下载适合您的平台的rpm包，安装即可：  http://dries.ulyssis.org/rpm/packages/perl-GD/info.html

(2) extman-1.1自带了图形化显示日志的功能；此功能需要rrdtool的支持，您需要安装此些模块才可能正常显示图形日志。

下面我们来添加一个域：

下面来注册邮箱，操作步骤如下：

出现如下页面：

在注册一个邮箱账号，测试两个账号之间是否可以收发邮件，详细操作在这里略过！！

#########################################################################

下面我们来测试一下是否可以给外网邮箱发邮件吗？：

登录到126邮箱查看是否收到邮件：显示收到了tom发过来的邮件，

十一、实现SSL会话加密机制配置如下：

1、生成私钥

#cd /etc/pki/CA/
#(umask 077;openssl genrsa -out private/cakey.pem 2048)
Generating RSA private key, 2048 bit long modulus
.......................+++
..................+++
e is 65537 (0x10001)
#ls private  //确认文件是否生成
cakey.pem

2、生成自签证书

#openssl req -new -x509 -key private/cakey.pem -out cacert.pem -days 3656
Country Name (2 letter code) [GB]:CN
State or Province Name (full name) [Berkshire]:beijing
Locality Name (eg, city) [Newbury]:fengtai
Organization Name (eg, company) [My Company Ltd]:Zengx
Organizational Unit Name (eg, section) []:Tech
Common Name (eg, your name or your server's hostname) []:ca.zengx.com
Email Address []:caadmin@zengx.com
编辑openssl.cnf文件
#vim /etc/pki/tls/openssl.cnf
把
dir =../../CA
修改为：
dir =/etc/pki/CA

3、给dovecot生成私钥

#mkdir /etc/dovecot/ssl -pv
#cd /etc/dovecot/ssl
#(umask 077;openssl genrsa 1024 > dovecot.key) -->生成私钥
#openssl req -new -key dovecot.key -out dovecot.csr -->生成证书签署请求
Country Name (2 letter code) [GB]:CN
State or Province Name (full name) [Berkshire]:beijing
Locality Name (eg, city) [Newbury]:fengtai
Organization Name (eg, company) [My Company Ltd]:Zengx
Organizational Unit Name (eg, section) []:Tech
Common Name (eg, your name or your server's hostname) []:mail.zengx.com
Email Address []:postadmin@zengx.com
Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:

签署证书：

#cd /etc/pki/CA
#mkdir certs newcerts crl
#touch index.txt
#echo 01 > serial
#cd /etc/dovecot/ssl/
#openssl ca -in dovecot.csr -out dovecot.crt -days 3656
Signature ok
Certificate Details:Serial Number: 1 (0x1)ValidityNot Before: Dec  3 05:14:06 2015 GMTNot After : Dec  6 05:14:06 2025 GMTSubject:countryName               = CNstateOrProvinceName       = beijingorganizationName          = ZengxorganizationalUnitName    = TechcommonName                = mail.zengx.comemailAddress              = postadmin@zengx.comX509v3 extensions:X509v3 Basic Constraints: CA:FALSENetscape Comment: OpenSSL Generated CertificateX509v3 Subject Key Identifier: 62:28:07:AA:FA:44:45:1E:31:CD:DE:4F:1F:8D:AB:C9:4F:0F:52:BBX509v3 Authority Key Identifier: keyid:9E:07:93:EA:CD:3E:F0:3A:DF:9A:84:18:87:61:78:F9:08:87:3D:37
Certificate is to be certified until Dec  6 05:14:06 2025 GMT (3656 days)
Sign the certificate? [y/n]:y
1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated

修改dovecot.conf配置文件：

#vim /etc/dovecot.conf
protocols = pop3 pop3s
ssl_disable = no
ssl_cert_file = /etc/dovecot/ssl/dovecot.crt
ssl_key_file = /etc/dovecot/ssl/dovecot.key
:wq 保存退出
#service dovecot restart  //重启服务
#netstat -tnlp  //查看端口是否被监听了
tcp        0      0 :::995        :::*          LISTEN      5620/dovecot
tcp        0      0 :::110        :::*          LISTEN      5620/dovecot

测试：

#openssl s_client -connect mail.zengx.com:995
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:Protocol  : TLSv1Cipher    : DHE-RSA-AES256-SHASession-ID: 84B3ED780437136624195FA74EF84858DD5DD523153B2790B27769A0633CA6A4Session-ID-ctx: Master-Key: 2C97D2DE1C19F02A327B0D119B13F8851F4792E3C3FDB42A03D3A4C98C9723820235E753BAFBEBCD28F95879686C9A73Key-Arg   : NoneKrb5 Principal: NoneStart Time: 1449120852Timeout   : 300 (sec)Verify return code: 21 (unable to verify the first certificate)
---
+OK Dovecot ready.
USER hadoop@magedu.com
PASS hadoop
LIST