#!/usr/bin/env python
import smtpd
import asyncore
import threading
import time

# enable logging
asyncore.dispatcher.ignore_log_types = []

class SmtpThread( threading.Thread ):
   def run(self):
      s = smtpd.SMTPServer(('127.0.0.1',9999),None)
      while True:
         asyncore.loop( timeout=1, count=1 )

# start first SMTP process
t1 = SmtpThread()
t1.start()
print 'started 1st thread'
time.sleep(1)

# attmpt to run second instance, does not fail gracefully
s = smtpd.SMTPServer(('127.0.0.1',9999),None)