Sender                                 Mail Server
------                                 -----------
(Open socket)
                                       (Open socket)
                                   <-- 220 mail.foobar.com is ready. TFS SMTP Server ver 3.1
HELO atlanta.foobar.com            -->
                                   <-- 250 mail.foobar.com, Hello atlanta.foobar.com
MAIL FROM: t.rose@foobar.com       -->
                                   <-- 250 Sender t.rose@foobar.com OK
RCPT TO: t.rose@foobar.com         -->
                                   <-- 250 Recipient t.rose@foobar.com OK
DATA                               -->
                                   <-- 354 Begin data transfer. End with period.
Date: Tue Apr 21 08:38:13 EDT 1998 
From: t.rose@foobar.com
To: t.rose@foobar.com
Subject: test                        

test
.                                  -->
                                   <-- 250 Message accepted
QUIT                               -->
                                   <-- 221 Connection closed
                                       (Close socket)
(Close socket)