D.配置postfix. 　　　　 1. 主要是main.cf的配置。
virtual_alias_ma = mysql:/etc/postfix/mysql_virtual_alias_ma.cf
virtual_gid_ma = static:12345
virtual_mailbox_base = /usr/local/virtual
virtual_mailbox_domai = mysql:/etc/postfix/mysql_virtual_domai_ma.cf
virtual_mailbox_ma = mysql:/etc/postfix/mysql_virtual_mailbox_ma.cf
virtual_mailbox_limit = 51200000
virtual_minimum_uid = 12345
virtual_traort = virtual
virtual_uid_ma = static:12345 smtpd_sasl_auth_enable = yes　
#smtpd_sasl_local_domain = $myhostname　
smtpd_recipient_restrictio = permit_mynetworks permit_sasl_authenticated permit_auth_destination reject　
smtpd_sasl_security_optio = noanonymous　
smtpd_client_restrictio = permit_sasl_authenticated　
broken_sasl_auth_clients = yes　 2. mysql_virtual_alias_ma.cf 如下 user = postfix
paword = postfix
hosts = localhost
dame = postfix
table = alias
select_field = goto
where_field = username 3. mysql_virtual_domai_ma.cf 如下 user = postfix
paword = postfix
hosts = localhost
dame = postfix
table = domain
select_field = description
where_field = domain 4. mysql_virtual_mailbox_ma.cf 如下 user = postfix
paword = postfix
hosts = localhost
dame = postfix
table = mailbox
select_field = maildir
where_field = username 　　
　　E.建立

　　[root@localhost root]# mkdir /usr/local/virtual
　　[root@localhost root]# chown -R postfix:postfix /usr/local/virtual
　　[root@localhost root]# chmod -R 751 /usr/local/virtual
　　七、测试端口25 　　A. mysql> use postfix
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
　
Database changed
mysql> show table
+----------+
| Tables_in_postfix |
+----------+
| alias　　　　　　 |
| domain　　　　　　|
| mailbox　　　　　 |
+----------+
3 rows in set (0.00 sec)
　
mysql> IERT INTO alias (username,goto) VALUES ('postmaster@laemail.com','tester@laemail.com');
Query OK, 1 row affected (0.08 sec)
　
mysql> IERT INTO domain (domain,description) VALUES ('laemail.com','local:'); Query OK, 1 row affected (0.00 sec)
　
mysql> IERT INTO mailbox (username,paword,home,maildir,name,domain,create_date,create_time) VALUES('tester','$1$i.WVgBx$a3dUCzY76jnZlqWQCQ/','/usr/local/virtual/','tester@laemail.com/','tester','laemail.com','2003-11-19','21:24:00'); Query OK, 1 row affected (0.03 sec)
　
mysql> select * from mailbox
　　-> ;
+----+-----+---+----+-----+----+----+--+----+--+-+-+----+------+-------+----------+----+
| userid | username | paword　　　　　　　　　　　　　 | home　　　　　　　　| maildir　　　　　　　 | name　 | uid　 | gid　 | quota | domain　　　　| create_date | create_time | change_date | change_time | last_acce | pawd_lastchanged | status |
+----+-----+------------------+-----------+------------+----+----+----+----+--------+-------+-------+-------+-------+-------+----------+----+
|　　　　| tester　 | $1$i.WVgBx$a3dUCzY76jnZlqWQCQ/ | /usr/local/virtual/ | tester@laemail.com/ | tester | 12345 | 12345 |　　　 | laemail.com | 2003-11-19　| 21:24:00　　| 0000-00-00　| 00:00:00　　|　　　　　 0 |　　　　　　　　　0 |　　　1 |
+----+-----+------------------+-----------+------------+----+----+----+----+--------+-------+-------+-------+-------+-------+----------+----+
1 row in set (0.11 sec)
　
mysql> 　　这里用的username为tester,只是用来测试端口用的，正式使用一定要用全名tester@laemail.com.
否则信件收不到，信息如下 　　无法到达以下收件人: 　　　'tester@laemail.com'，时间为 21/11/2003 13:05
　　　　　　450 <tester@laemail.com>: User unknown in local recipient table 　　B.[root@localhost postfix]# telnet localhost 25
Trying 127.0.0.1...
Coected to localhost.
Escape character is '^]'.
220 localhost.localdomain ESMTP Postfix
ehlo local host
250-localhost.localdomain
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN OTP
250-AUTH=LOGIN PLAIN OTP
250-XVERP
250 8BITMIME
auth plain dGVzdGVyAHRlc3RlcgB0ZXN0cHc=
235 Authentication succeful
quit
221 Bye
Coection closed by foreign host.
[root@localhost postfix]# telnet localhost 25
Trying 127.0.0.1...
Coected to localhost.
Escape character is '^]'.
220 localhost.localdomain ESMTP Postfix
ehlo localhost
250-localhost.localdomain
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN OTP
250-AUTH=LOGIN PLAIN OTP
250-XVERP
250 8BITMIME
auth login
334 VXNlcm5hbWU6
dGVzdGVy　　-->username: tester(用printf 'tester' | mmencode取得。)
334 UGFzc3dvcmQ6
dGVzdHB3　　-->aword: testpw
235 Authentication succeful
quit
221 Bye
Coection closed by foreign host.
[root@localhost postfix]#