send-mail: IPv6 support is disabled

今天在生产环境上安装nagios时，发现一个问题，主机出问题了，不会发送邮件。于是用echo "hello" | mail -s "FUCK" xxxx@xxxx.com 时

报了一下错

send-mail: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol
send-mail: warning: inet_protocols: configuring for IPv4 support only

修改方法:

/usr/sbin/postconf | grep inet_protocols  --查看当前的inet_protocols 

inet_protocols = all

vi /etc/postfix/main.cf

inet_protocols = all

改为inet_protocols = ipv4

重启/etc/init.d/postfix restart

搞掂收工