sed -i ‘s/inet_interfaces = localhost/inet_interfaces = all‘ /etc/postfix/main.cf
service postfix restart
参考：
https://blog.csdn.net/xiangshanqishi/article/details/23439397
CentOS 7下启动postfix服务报错：fatal: parameter inet_interfaces: no local interface found for ::1
原文：https://www.cnblogs.com/EasonJim/p/9944495.html