启动postfix的时候报错：
[root@hadoop002 tmp]# systemctl enable postfix && systemctl start postfix Job for postfix.service failed because the control process exited with error code. See "systemctl status postfix.service" and "journalctl -xe" for details. [root@hadoop002 tmp]# systemctl status postfix.service ● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Wed 2020-01-22 20:05:57 CST; 14s ago Process: 1227 ExecStart=/usr/sbin/postfix start (code=exited, status=1/FAILURE) Process: 1224 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS) Process: 1221 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=75) Jan 22 20:05:55 hadoop002 systemd[1]: Starting Postfix Mail Transport Agent... Jan 22 20:05:55 hadoop002 aliasesdb[1221]: /usr/sbin/postconf: fatal: parameter inet_interfaces: no local interface found for ::1 Jan 22 20:05:56 hadoop002 aliasesdb[1221]: newaliases: fatal: parameter inet_interfaces: no local interface found for ::1 Jan 22 20:05:56 hadoop002 postfix[1227]: fatal: parameter inet_interfaces: no local interface found for ::1 Jan 22 20:05:57 hadoop002 systemd[1]: postfix.service: control process exited, code=exited status=1 Jan 22 20:05:57 hadoop002 systemd[1]: Failed to start Postfix Mail Transport Agent. Jan 22 20:05:57 hadoop002 systemd[1]: Unit postfix.service entered failed state. Jan 22 20:05:57 hadoop002 systemd[1]: postfix.service failed.
解决方法：
[root@hadoop002 ~]# vim /etc/postfix/main.cf
#inet_interfaces = all #inet_interfaces = $myhostname #inet_interfaces = $myhostname, localhost inet_interfaces = all # Enable IPv4, and IPv6 if supported inet_protocols = ipv4