[root@chrisnux ~]# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
220 chrisnux.office ESMTP Postfix
ehlo eddnux
250-chrisnux.office
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250 8BITMIME