1、配置hosts映射

2、安装Postfix与Mailx工具

[root@mail ~]# yum -y install postfix mailx[root@mail ~]# systemctl start postfix[root@mail ~]# systemctl enable postfix[root@mail ~]# netstat -anput | grep 25tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      1820/master

3、定义Postfix配置文件

[root@mail ~]# vim /etc/postfix/main.cfmyhostname = mail.mds.commydomain = mds.commyorigin = $mydomaininet_interfaces = allmydestination = $myhostname,$mydomain

4、申请163邮件证书

[root@mail ~]# mkdir /root/.certs[root@mail ~]# echo -n | openssl s_client -connect smtp.163.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/163.crt[root@mail ~]# certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt[root@mail ~]# certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt[root@mail ~]# certutil -L -d /root/.certs[root@mail ~]# certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs/ -i ~/.certs/163.crt

5、借用163邮箱发送邮件

[root@mail ~]# vim /etc/mail.rcset ssl-verify="ignore"set smtp-auth="login"set from="mds302587@163.com"set smtp="smtps://smtp.163.com:465"set smtp-auth-user="mds302587@163.com"set smtp-auth-password="123456"set nss-config-dir="/root/.certs"

6、重启服务并发送测试邮件

[root@mail ~]# systemctl restart postfix[root@mail ~]# echo "This is a test mail" | mail -s '邮件测试' 452666750@qq.com

7、确认接收邮件

相关教程推荐：centos教程

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