kn:viljanen% telnet helsinki.fi 25
Trying 128.214.4.16 ...
Connected to helsinki.fi.
Escape character is '^]'.
220 kantti.helsinki.fi Sendmail 8.6.9/8.6.5 ready at Tue, 8 Nov 1994 16:36:41 +0200
EHLO kantti.helsinki.fi
250-kantti.helsinki.fi Hello viljanen@kantti [128.214.4.16], pleased to meet you
250-EXPN
250-SIZE
250-8BITMIME
250 HELP
QUIT
221 kantti.helsinki.fi closing connection
Connection closed by foreign host.