[root@zabbix ~]# vim /etc/mail.rcset SMTP=smtp.126.com
set SMTP-AUTH=login
set SMTP-AUTH-USER=lxr913909626@126.com
set SMTP-AUTH-PASSWORD=xxxxxxxxxxxxxx //此处输入126邮箱授权码
set FROM=lxr913909626@126.com
//重启postfix
[root@zabbix ~]# systemctl restart postfix