[K12OSN] Email content filtering

Julius Szelagiewicz julius at turtle.com
Thu Apr 8 17:47:34 UTC 2004

On Thu, 8 Apr 2004, Les Mikesell wrote:

> 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.
MimeDefang was such a pain to install, that I went with ScanMail - install
was rather easy and it works very well with SpamAssassin and antivirus
software. julius

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