Not sure what you mean, but if you mean "telnet mailhost 25"
than here is an example: telnet mail.xxx.xxx 25
Trying 201.xx.xxx.xxx...
Connected to mail.xxx.xxx.
Escape character is '^]'.
220 mail.xxx.xxx ESMTP helo HOSTNAME
250 xxx.xxx mail from: sps@localhost
250 ok rcpt to: sps@remotehost.com
250 ok data
354 go ahead From: sps@localhost
To: any-old-user@anyhost.com
Subject: testing
THis is a test
.
250 ok 1000313764 qp 29803 quit
221 mail.xxx.xxx
Connection closed by foreign host.
Note that the respone from the server may vary (this is talking with qmail).
Hope This Helps,
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