Job for postfix.service failed because the control process exited with error code. See "systemctl st

Job for postfix.service failed because the control process exited with error code. See "systemctl st

gitlab 无法启动；

这是因为防火墙或者配置文件导致，无法启动的邮件服务！！

首先关闭防火墙！

修改配置文件

vim /etc/postfix/main.cf

inet_protocols = ipv4 inet_interfaces = all

这样就可以启动服务了，看效果图（如下图所示）