WUMI - Plugable Pyhthon Sendmail Milter

what is it (good for)?

A sendmail Milter written in Python.
blocking mail during smtp handshake - no need for mailserver to create bounces
Easily extendable plugin interface
ready for use plugins

built in plugins

spambayes: works against one hammiedb and rejects mail with "highscore"
attachment blocker: blocks certain attachments (configurable list), also within .zip files
blacklist: blocks mail if remote server is listed on one or more blacklists

For antivirus an sendmail: there is clamav-milter and avira has a perfect (!!) milterbased solution, too.

Your Mailserver does not have to send nonsense bounces anymore.

The software is a sendmail milter, written in python. It is plugin - enabled and tests the mail content after the remote server finished the SMTP "DATA" step. At this place wumi is able to reject a mail. The server has seen it, but refuses to deliver it. Thus we do not need to send bounces (to faked adresses!) nor do out users have to deal with nonsense mails (like "our virus scanner removed the attachment" or the like).

We at wu-wien.ac.at plan to include a bayes-based plugin in this software, so we will be able to reject spam *during the initial smtp connection*.

The software is in production use at wu-wien.ac.at, you can test the behavior by e.g. sending an ".exe" attachment to postmaster@wu-wien.ac.at. Our mailserver will block this, and you will see how the software works.

Disclaimer

I sincerely apologize for this ugly code - it really needs a reorganisation. Dont use it unless you are somewhat familiar with python.

Georg Graf