$ telnet mail.example.com 25
Trying 127.0.0.42...
Connected to mail.example.com (127.0.0.42).
Escape character is '^]'.
220 mail.example.com ESMTP
HELO mail.example.org
250 mail.example.com
MAIL FROM: <sender@example.org>
250 ok
RCPT TO: <recipient1@example.com>
250 ok
RCPT TO: <recipient2@example.com>
250 ok
RCPT TO: <recipient3@example.com>
250 ok
DATA
354 go ahead
Date: 02 Sep 2011 01:45:59 -0500
Subject: test
From: "Sender" <sender@example.org>
To: "Recipient 1" <recipient1@example.com>
CC: "Recipient 2" <recipient2@example.com>

test
.
250 ok 1314945967 qp 19908
quit
221 mail.example.com
Connection closed by foreign host.

##</code><code>##

Received: (qmail 12019 invoked from network); 2 Sep 2011 01:46:09 
  -0500
Received: from mail.example.org (HELO mail.example.org) (127.0.0.23)
  by mail.example.com with SMTP; 2 Sep 2011 01:46:20 -0500
Received-SPF: pass (mail.example.org: SPF record at example.org 
  designates 127.0.0.23 as permitted sender)
Date: 02 Sep 2011 01:45:59 -0500
Subject: test
From: "Sender" <sender@example.org>
To: "Recipient 1" <recipient1@example.com>
CC: "Recipient 2" <recipient2@example.com>

test