Mandriva Linux Security Advisory – Scrubber.py, in Mailman 2.1.5 and earlier, when using email 2.5 (part of Python), is susceptible to a DoS (mailman service stops delivering for the list in question) if it encounters a badly formed mime multipart message with only one part and that part has two blank lines between the first boundary and the end boundary.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/45099/MDKSA-2006-061.txt
Source: https://packetstormsecurity.com/files/45099/Mandriva-Linux-Security-Advisory-2006.061.html