关闭sendmail服务
（1）[root@sample~]#/etc/rc.d/init.d/sendmailstop ←关闭sendmail服务
或者[root@sample~]#servicesendmailstop ←关闭sendmail服务Shuttingdownsendmail:[OK]Shuttingdownsm-client:[OK]（2）[root@sample~]#chkconfigsendmailoff ←关闭sendmail自启动
（3）[root@sample~]#chkconfig--listsendmail ←确认sendmail自启动已被关闭（都为off就OK）
sendmail0:off1:off2:off3:off4:off5:off6:off