A sendmail Milter written in Python. It rejects Mail containing certain attachment filenames (.exe, .pif ..., configurable) or containing a virus (calling a single-user license commandline scanner) by answering the smtp DATA step with "554 5.7.1". Thus
Spitman is a spam filter, written in python and intended for desktop use. It will fetch the mail from the mailserver and put this in a local file, wich your mail client can check.