220 mx.testmessage.org ESMTP service ready
EHLO client.example
250-mx.testmessage.org Hello client.example
250-PIPELINING
250-8BITMIME
250 STARTTLS
MAIL FROM:<sender@example.com>
250 2.1.0 Sender OK
RCPT TO:<postmaster@testmessage.org>
250 2.1.5 Recipient OK
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: Test message
From: sender@example.com
To: postmaster@testmessage.org
This is a test message.
.
250 2.0.0 Message accepted for delivery
MAIL>