centos7怎么使用postfix发送邮件

[root@mail ~]# yum -y install postfix mailx

[root@mail ~]# systemctl start postfix

[root@mail ~]# systemctl enable postfix

[root@mail ~]# netstat -anput | grep 25

tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      1820/master

[root@mail ~]# vim /etc/postfix/main.cf

myhostname = mail.mds.com

mydomain = mds.com

myorigin = $mydomain

inet_interfaces = all

mydestination = $myhostname,$mydomain