Here are all the commands without interruption:
telnet mail.com 25
Trying 69.63.149.30...
Connected to mail.com (69.63.149.30).
Escape character is '^]'.
220 mail.port25.com (PowerMTA(TM) v4.0) ESMTP service ready
EHLO server.example.com
250-mail.port25.com says hello
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250-8BITMIME
250-XACK
250-XMRG
250-SIZE 54525952
250-VERP
250 DSN
MAIL FROM: <support@whatever.com>
250 2.1.0 MAIL ok
RCPT TO: <support@whomever.com>
250 2.1.5 <support@whomever.com> ok
DATA
354 send message
From: "John Smith" <jsmith@whatever.com>
To: "Jane Doe" <jdoe@whomever.com>
Subject: test message sent from manual telnet session
Date: Wed, 11 May 2011 16:19:57 -0400
Hello World,
This is a test message sent from a manual telnet session.
Yours truly,
SMTP administrator
.
250 2.6.0 message received
QUIT
221 2.0.0 mail.com says goodbye