View source for Email testing with telnet

example:

 $ '''telnet yourmailserver.com 25'''<br>
 Trying 21.40.23.46...<br>
 Connected to yourmailserver.com.<br>
 Escape character is '^]'.<br>
 220 mx.yourmailserver.com ESMTP Sendmail 8.12.9/8.12.9; Thu, 12 Jun 2003 10:06:19 -0700<br>
 helo frommail.com<br>
 250 main.signalq.com Hello [12.24.14.32], pleased to meet you<br>
 '''mail from: butter22333@frommail.com'''<br>
 250 2.1.0 butter22333@frommail.com... Sender ok<br>
 '''rcpt to: webmaster@yourmailserver.com'''<br>
 250 2.1.5 webmaster@yourmailserver.com... Recipient ok<br>
 '''data'''<br>
 354 Enter mail, end with "." on a line by itself<br>
 '''Subject: test message'''<br>
 '''this is a test<br>'''
 '''.'''<br>
 250 2.0.0 h5CH6GVI015806 Message accepted for delivery<br>
 quit<br>
 221 2.0.0 mx.yourmailserver.com closing connection<br>
 Connection closed by foreign host.<br>