Dan wrote:
I would like a Mail Transfer Agent recommendation. What's the best MTA, running on any platform, that will accept two or more thresholds (non-contiguous weight values) for treating messages as spam? Something like:
...
Where 4 paths are possible, instead of the normal 2 (below 10 allow, above 10 tag) such that the treat-as-ham values are literally in between the spam values. This can be native or via a plugin.
Sendmail with MIMEDefang <www.mimedefang.org> can do that. MIMEDefang can talk to SpamAssassin and several virus scanners, and you can control its behavior using Perl. This means you can set up any behavior you want.
As an example, we currently have a three-tiered setup where mail below the SpamAssassin threshold is allowed through, mail above a higher threshold is rejected, and mail in the middle is let through but flagged as spam. It would have no problem defining behavior for additional score ranges.
MIMEDefang is free and open-source (GPL). The authors also have a commercial product, Can-It, with additional capabilities and simpler administration: <www.roaringpenguin.com>
-- Kelson Vibber SpeedGate Communications <www.speed.net>
