配置认证
在邮箱中加入认证功能，那么不在relay配置范围内的用户，只要用户名和密码正确，就可以发送邮件
1
、安装sasl
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[root@localhost ~]#
rpm -qa | grep sasl
[root@localhost ]#
yum install -y sasl
Loaded plugins: fastestmirror, refresh-packagekit, security
Complete!
[root@localhost]#
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2
、配置postfix，编辑配置文件“/etc/postfix/main.cf”
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[root@localhost ~]#
gedit /etc/postfix/main.cf
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated, reject_unauth_destination
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3
、启动sasl和postfix
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[root@localhost ~]#
service saslauthd start
启动
postfix
：
[
确定
]
[root@localhost ~]#
service postfix start
启动
postfix
：
[
确定
]
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4
、验证
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[root@localhost ~]#
telnet 192.168.0.113 25
Trying 192.168.0.113...
Connected to 192.168.0.113.
Escape character is '^]'.
220 mailsrv.david.cn ESMTP Postfix
ehlo 192.168.0.113
250-mailsrv.david.cn
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN //
这两句说明成功了
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
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