postfix与sendmail冲突

在Linux服务器（CentOS release
6.6）上配置好了sendmail后，测试发送邮件时发现有问题，检查sendmail服务的状态，发现其处于“sendmail dead but
subsys locked”，
检查发现postfix服务也在运行。只需要将postfix服务停掉即可。为什么会出现这种情况呢？Something was
occasionally causing the postfix service to start which then caused the
status of sendmail to jump to dead but subsys locked. 两种似乎不兼容。

操作步骤：

1：检查sendmail服务的状态

[root@DB-Server ~]# service sendmail status

sendmail dead but subsys locked

sm-client (pid  22112) is running...

2：检查postfix服务的状态

[root@DB-Server ~]# service postfix status

master (pid  1777) is running...

3：停止postfix服务

[root@DB-Server ~]# service postfix stop

Shutting down postfix: [  OK  ]

4：重新启动sendmail服务

[root@DB-Server ~]# service sendmail stop

Shutting down sm-client: [  OK  ]

Shutting down sendmail: [FAILED]

[root@DB-Server ~]# service sendmail stop

[root@DB-Server ~]# service sendmail start

Starting sendmail: [  OK  ]

Starting sm-client: [  OK  ]

5：禁用postfix在reboot后自动启动

      检查一下是否有设定 postfix 在 reboot 后自动启动
chkconfig --list | grep postfix

chkconfig postfix off