[K12OSN] Email content filtering

[Les Mikesell]

On Thu, 2004-04-08 at 10:27, Eric J. Feldhusen wrote:
> Does anyone know of a open-source email content filter?

MimeDefang (http://www.mimedefang.org/) is a good system
side framework for running scanners. It hooks to sendmail
as a milter so it is possible to refuse messages at the SMTP
level as a result of the content scan instead of having to
construct a bounce message and return it.  It works by
breaking out the attachments and running your choice of
scanning programs over the content, typically using
SpamAssassin and a virus checker like clam antivirus.
SpamAssassin works by assigning values to different patterns
and scoring according to the total of those values.  There
are rules in the stock configuration to match most pornography
related phrases but you might need to bump up the values to
make them easier to block.

---
  Les Mikesell
   les at futuresource.com