This is simplest SMTP server you'll ever see. It's asynchronous.
One instance should handle over one thousand emails per second, thanks to Gevent.
Give your app an inbox easily:
from inbox import Inbox
inbox = Inbox()
@inbox.collate
def handle(to, sender, subject, body):
...
# Bind directly.
inbox.serve(address='0.0.0.0', port=4467)
You can also defer to the commandline:
if __name__ == '__main__':
inbox.dispatch()
$ dasinbox.py 0.0.0.0 4467 [2012-04-28 07:31] INFO: inbox: Starting SMTP server at 0.0.0.0:4467
Installing Inbox.py is simple:
$ pip install inbox