如何查看postfix的版本
[root@localhost sasl2]# postconf -d | grep mail_version
mail_version = 2.10.1
milter_macro_v = $mail_name $mail_version
[root@localhost sasl2]# rpm -qa | grep postfix
postfix-2.10.1-6.el7.x86_64
[root@localhost sasl2]# postconf -d | grep mail_version
mail_version = 2.10.1
milter_macro_v = $mail_name $mail_version
[root@localhost sasl2]# rpm -qa | grep postfix
postfix-2.10.1-6.el7.x86_64
