[herrold@centos-4 novell]$ telnet 80.84.72.21 25
Trying 80.84.72.21...
Connected to mail.uklinux.net (80.84.72.21).
Escape character is '^]'.
220 ftp.first.lan ESMTP Sendmail 8.13.1/8.13.1; Tue, 12 Dec 2006 10:50:32 -0500
quit
221 2.0.0 ftp.first.lan closing connection
Connection closed by foreign host.
[herrold@centos-4 novell]$