ActiveState Developing "Mail Filter Engine" for Sendmail
Sendmail is the most widely used Mail Transfer Agent (MTA) in the world. As such, it enjoys the advantage that most technical products with the largest market share in their niche share: a rich set of third party add-ons and accessories.
One of the most interesting Sendmail add-ons we've ever seen is PerlMx from ActiveState Tool Corporation. This product allows you to build sophisticated filering and performance monitoring tools into the back end of the Sendmail mail exchanger. The big advantage is that this can be done in Perl, not just in C, which used to be the only way to do it.
CTDATA is not currently using Sendmail, but we are definitely looking at moving to it. Part of the reason is that we want to be able to monitor and control the mail server using the same tool sets that we use to develop solutions for our customers.
We are definitely keeping an eye on PerlMx and we will probably talk more about it on this Web Site in the future.