支持虚拟域名的邮件服务器

用到的软件列表：
1、POP3服务
　　courier-authlib-0.58.tar.bz2
　　courier-imap-4.1.0.tar.bz2

2、SMTP服务
　　cyrus-sasl-2.1.21.tar.gz
　　postfix-2.2.9.tar.gz

3、附加软件
　　pam_mysql-0.7RC1.tar.gz　(MySQL的PAM验证程序)
　　mysql-4.0.26.tar.gz　(MySQL数据库，存储域名、用户登录等信息) 注：所有软件都放在“/root/soft/mail/”目录下，所以安装相关的软件时均在该目录下进行操作，当然也可以放在“/tmp”等其它目录下。
1、安装MySQL并启动
#tar xzvf mysql-4.0.26.tar.gz
#cd mysql-4.0.26
#groupadd mysql
#useradd mysql
#./configure --prefix=/usr/local/mysql  --with-mysqld-user=mysql --enable-big-tables --with-charset=gbk --with-extra-charsets=all
#make && make install
#scripts/mysql_install_db
#cp support-files/my-large.cnf /etc/my.cnf
#ln -s /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld
#/etc/init.d/mysqld start

共享MySQL的公共库文件
#echo "/usr/local/mysql/lib/mysql" >> /etc/ld.so.conf

#ldconfig

2、导入MySQL数据
建立postfix数据库，并建立帐号“postfix”，密码也是“postfix”。

CREATE DATABASE postfix; GRANT ALL ON postfix.* TO postfix@localhost IDENTIFIED BY 'postfix'; use postfix; CREATE TABLE alias ( address varchar(255) NOT NULL default '', goto text NOT NULL, PRIMARY KEY (address) )TYPE=MyISAM; CREATE TABLE domain ( domain varchar(255) NOT NULL default '', description varchar(255) NOT NULL default '', PRIMARY KEY (domain) )TYPE=MyISAM; CREATE TABLE mailbox ( username varchar(255) NOT NULL default '', password varchar(255) NOT NULL default '', transport varchar(9) NOT NULL default 'virtual', PRIMARY KEY (username) )TYPE=MyISAM;

插入测试数据

INSERT INTO domain VALUES('mail.cnzxh.net', '...'); INSERT INTO mailbox(username, password) VALUES('[email protected]', ENCRYPT('123'));

3、安装公共库文件（若已经装好则无需安装）
#apt-get install libpam0g-dev
#apt-get install libdb4.3-dev

4、安装cyrus-sasl-2.1.21.tar.gz
#tar xzvf cyrus-sasl-2.1.21.tar.gz
#cd cyrus-sasl-2.1.21
#./configure --prefix=/usr/local/sasl2 --with-mysql=/usr/local/mysql --enable-sql --enable-plain --enable-login --with-saslauthd=/var/run --with-pam
#make && make install
#ln -sf /usr/local/sasl2/lib/* /usr/lib/

5、安装pam_mysql-0.7RC1.tar.gz
#tar xzvf pam_mysql-0.7RC1.tar.gz
#cd pam_mysql-0.7RC1
#./configure --with-mysql=/usr/local/mysql --with-cyrus-sasl2=/usr/local/sasl2
#make && make install

6、安装postfix-2.2.9.tar.gz
#tar xzvf postfix-2.2.9.tar.gz
#cd postfix-2.2.9
#make makefiles AUXLIBS="-L/usr/lib -lsasl2 -L/usr/local/mysql/lib/mysql -lmysqlclient -lz -lm" CCARGS="-DUSE_SASL_AUTH -I/usr/local/sasl2/include/sasl -DHAS_MYSQL -I/usr/local/mysql/include/mysql"
#make && make install
（注：安装时一路回车即可）
#postalias /etc/postfix/alias
#postmap /etc/postfix/virtual

7、配置smtpd.conf及MySQL的PAM验证文件
#cat /usr/lib/sasl2/smtpd.conf

pwcheck_method: saslauthd mech_list: plain login

注：在sasl2的新版本中可以直接使用SQL查询，如“/usr/lib/sasl2/smtpd.conf”文件中可以写上：

sasl_pwcheck_method: auxprop sasl_auxprop_plugin: sql sasl_mech_list: plain login sql_engine: mysql sql_hostnames: localhost sql_database: postfix sql_user: postfix sql_passwd: postfix sql_select: SELECT password FROM mailbox WHERE username='%u@%r';

再删除“/usr/lib/sasl2/libotp*”即可。

#cat /etc/pam.d/smtp

auth sufficient pam_mysql.so user=postfix passwd=postfix host=localhost db=postfix table=mailbox usercolumn=username passwdcolumn=password crypt=1 auth sufficient pam_unix_auth.so account required pam_mysql.so user=postfix passwd=postfix host=localhost db=postfix table=mailbox usercolumn=username passwdcolumn=password crypt=1 account sufficient pam_unix_acct.so

#ln -s /etc/pam.d/smtp /etc/pam.d/pop3

8、配置postfix
#cat /etc/postfix/main.cf

command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix myhostname = postfix.virtual.com mydomain = virtual.com myorigin = $mydomain inet_interfaces = all mydestination = $mydomain,$myhostname unknown_local_recipient_reject_code = 550 mynetworks = 192.168.0.0/24, 127.0.0.0/8 alias_maps = hash:/etc/postfix/aliases alias_database = hash:/etc/postfix/aliases header_checks = regexp:/etc/postfix/header_checks smtpd_banner = $myhostname ESMTP $mail_name sendmail_path = /usr/sbin/sendmail newaliases_path = /usr/bin/newaliases mailq_path = /usr/bin/mailq home_mailbox = Maildir/ virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_uid_maps = static:105 virtual_gid_maps = static:111 virtual_minimum_uid = 105 virtual_mailbox_base = /var/spool/mail virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_security_options = noanonymous smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated,reject_unauth_destination

注：其中的“105”和“110”分别是帐号“postfix”及组“postdrop”的ID号，需要根据情况自行设定。若机器里面已经存在相应的组和帐号则不必新建，否则需要新建组“postdrop”和帐号“postfix”，并记录下他们的ID号。

#cat /etc/postfix/mysql_virtual_alias_maps.cf

user = postfix password = postfix hosts = localhost dbname = postfix table = alias select_field = goto where_field = address

#cat /etc/postfix/mysql_virtual_domains_maps.cf

user = postfix password = postfix hosts = localhost dbname = postfix table = domain select_field = description where_field = domain

#cat /etc/postfix/mysql_virtual_domains_maps.cf

user = postfix password = postfix hosts = localhost dbname = postfix table = mailbox select_field = concat(username, '/') where_field = username

9、启动sasl2及postfix测试smtp服务是否正常
#/usr/local/sasl2/saslauthd -r -a pam
#postfix start
#perl -MMIME::Base64 -e 'print encode_base64("web\@mail.cnzxh.net\000web\@mail.cnzxh.net\000123");'
d2ViQG1haWwuY256eGgubmV0AHdlYkBtYWlsLmNuenhoLm5ldAAxMjM=
#telnet localhost 25

Trying 127.0.0.1... Connected to localhost.localdomain. Escape character is '^]'. 220 postfix.im.ac.cn ESMTP Postfix ehlo localhost 250-postfix.im.ac.cn 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250 8BITMIME AUTH PLAIN d2ViQG1haWwuY256eGgubmV0AHdlYkBtYWlsLmNuenhoLm5ldAAxMjM= 235 Authentication successful quit 221 Bye Connection closed by foreign host.

10、安装courier-authlib-0.58.tar.bz2
#tar xjvf courier-authlib-0.58.tar.bz2
#cd courier-authlib-0.58
#./configure --prefix=/usr/local/authlib --with-mailuser=postfix --with-mailgroup=postfix --with-mysql-libs=/usr/local/mysql/lib/mysql --with-mysql-includes=/usr/local/mysql/include/mysql --with-authmysqlrc=/usr/local/authlib/etc/authmysqlrc --with-authdaemonrc=/usr/local/authlib/etc/authdaemonrc
#make && make install
#cd /usr/local/authlib/etc/
#cp authdaemonrc.dist authdaemonrc
#cp authmysqlrc.dist authmysqlrc
#vi authdaemonrc

authmodulelist="authmysql authpam"

#cat authmysqlrc

MYSQL_SERVER            localhost MYSQL_USERNAME          postfix MYSQL_PASSWORD          postfix MYSQL_PORT              0 MYSQL_OPT               0 MYSQL_DATABASE          postfix MYSQL_USER_TABLE        mailbox MYSQL_CRYPT_PWFIELD     password MYSQL_UID_FIELD         105 MYSQL_GID_FIELD         111 MYSQL_LOGIN_FIELD       username MYSQL_HOME_FIELD        '/var/spool/mail/' MYSQL_NAME_FIELD        username MYSQL_MAILDIR_FIELD     CONCAT('/var/spool/mail/', username, '/')

11、安装ourier-imap-4.1.0.tar.bz2
#tar xjvf ourier-imap-4.1.0.tar.bz2
#cd ourier-imap-4.1.0
#./configure --prefix=/usr/local/imap --enable-unicode=utf-8,iso-8859-1,gb2312,big5 --disable-root-check --with-trashquota --without-ipv6 CPPFLAGS='-I/usr/local/authlib/include' LDFLAGS='-L/usr/local/authlib/lib/authlib -L/usr/lib' COURIERAUTHCONFIG='/usr/local/authlib/bin/courierauthconfig'
#make
#make install
#make install-configure
#cd /usr/local/imap/etc/
#vi pop3d

POP3DSTART=YES

12、测试POP3服务
#/usr/local/authlib/libexec/courier-authlib/authdaemond&
#/usr/local/imap/libexec/pop3d.rc start
#telnet localhost 110

Trying 127.0.0.1... Connected to localhost.localdomain. Escape character is '^]'. +OK Hello there. user [email protected] +OK Password required. pass 123 +OK logged in. quit +OK Bye-bye. Connection closed by foreign host.

13、到此结束，这只是基本的安装步骤，没有太多说明。若出现了一些无法解释的错误，可以查看/var/log/mail.*或/usr/log/auth.log等日志文件，一般都可以从中找到问题的根原。