1，定义规范等级，名称分别为local_only与local_only1，修改main.cf（注：红色的代表新增加的）
[root@mail postfix]# vi main.cf
#youshengtao 2010-10-12
smtpd_restriction_classes = local_only, local_only1
local_only = check_recipient_access hash:/etc/postfix/plugin/plugin.list,reject
local_only1 = check_sender_access hash:/etc/postfix/plugin/plugin.users,reject
smtpd_recipient_restrictions
= reject_unknown_sender_domain, reject_unknown_recipient_domain,
reject_non_fqdn_sender, reject_non_fqd
n_recipient, reject_unlisted_recipient, check_sender_access
hash:/etc/postfix/plugin/plugin.users, check_sender_access
hash:/etc/postfix/plugin/local_senders, check_recipient_access
hash:/etc/postfix/plugin/local_recipients, permit_mynetworks, permit_sasl_authenticated, rejec
t_unauth_destination, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_policy_service inet:127.0.0.1:10031
2，建立相关的目录，也可以不建目录，直接放在postifx目录下面，不过，为了以后维护方便，我还是建了一个目录。
[root@mail ~]# mkdir -p /etc/postfix/plugin
[root@mail ~]# cd /etc/postfix/plugin/
[root@mail plugin]# vi local_recipients
qtyg@ourgame.com local_only1
[root@mail plugin]# vi local_senders
wanglujing@ourgame.com local_only
renlina@ourgame.com local_only
caiyanyan@ourgame.com local_only
qinwen@ourgame.com local_only
shiwanting@ourgame.com local_only
[root@mail plugin]# vi plugin.list
qtyg@ourgame.com OK
[root@mail npc]# vi plugin.users
wanglujing@ourgame.com OK
renlina@ourgame.com OK
caiyanyan@ourgame.com OK
qinwen@ourgame.com OK
shiwanting@ourgame.com OK
3，使用postmap将下列的文件转换成postfix可直接查询的格式。
postmap hash:/etc/postfix/plugin/plugin.list
postmap hash:/etc/postfix/plugin/plugin.users
postmap hash:/etc/postfix/plugin/local_senders
postmap hash:/etc/postfix/plugin/local_recipients
4，重载postfix后，邮件服务器正常工作，实现了我们需要的功能。
[root@mail npc]# service postfix reload
重新载入postfix：[确定]
參考來源：
http://chlotte.blog.51cto.com/318402/404764/
