Method of shutting down SendMail service under CentOS

method of shutting down SendMail service under CentOS SendMail is the most important message transfer agent. It is important to understand the working mode of e-mail. In general, we decompose email programs into user agents, transport agents, and delivery agents. Close the SendMail service specific commands are implemented as follows: Turn off the SendMail service (1) [Root@sample ~]#/etc/rc.d/init.d/sendmail stop← shutdown sendmail Service or [root@sample ~]# service SendMail stop← shutdown sendmail Services Shutting down SendMail: [OK] Shutting down sm-client: [OK] (2) [Root@sample ~]# chkconfig sendmail off← shutdown sendmail from start (3) [Root@sample ~]# chkconfig--list sendmail← confirm that the SendMail has been turned off (all off OK) SendMail 0:off 1:off 2:off 3:off 4:off 5:off 6:off