vim /etc/mail.rc #postfix

set from=lyj201551@163.com
set smtp=smtp.163.com
set smtp-auth-user=lyj201551@163.com
set smtp-auth-password=HRRXMGYQIREFRRFO
set smtp-auth=login

测试

echo   "我是闫佳芹的爸爸"   |mail  -s  "我是刘永江"    6666666@qq.com