OS/2, eCS & ArcaOS - Technical > Mail-News

PMMail and filters - this one is not working...why?

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Neil Waldhauer:
A few versions ago, my complex PMMail filter ran out of space (1024 char maximum). This was fixed. I don't recall what the max length is now, but longer than 1024.

Doug Bissett:

--- Quote ---Oh yeah, its out there, just sort of burried inside the Help screens. This is supposed to provide wildcard match where the "xyz" occurs at the end of the string (that's the meaning behind "-z" option), so in effect you would be picking up stuff like "bad_player@spamer.xyz".
--- End quote ---

I don't find it. What version of PMMail are you using? Way back, after VOICE got the code, it was discovered that a number of those things actually didn't do what they were supposed to do. That was fixed, but not necessarily according to what was happening, or what was described, in the previous versions of PMMail.

I would also suggest that this sort of SPAM filtering is very much better handled by the PMMail SPAM filter (BogoFilter), than by trying to manually build the type of filters that you are attempting to use. The SPAM filter does require some initial training (good, and bad), but once it is trained it will do a great job, and is easy to use. On going training will be required, but it is a lot easier than trying to figure out complex filters..

Dariusz Piatkowski:
Doug,


--- Quote from: Doug Bissett on June 11, 2022, 11:18:21 pm ---I don't find it. What version of PMMail are you using? Way back, after VOICE got the code, it was discovered that a number of those things actually didn't do what they were supposed to do. That was fixed, but not necessarily according to what was happening, or what was described, in the previous versions of PMMail.

--- End quote ---

I'm on "3.25.00.1993 (32809) - Jul 25 2021 13:20:17 +0000 (GMT)".

Search for ".-z" in Help, for me it comes up under the "ICSL Help" section.


--- Quote from: Doug Bissett on June 11, 2022, 11:18:21 pm ---...I would also suggest that this sort of SPAM filtering is very much better handled by the PMMail SPAM filter (BogoFilter), than by trying to manually build the type of filters that you are attempting to use...
--- End quote ---

That is in fact what I started to do this past week.

I was aware of the functionality, however I just never took the time to investigate it further as my regular SPAM filter collection was working very well for me. However, as you pointed out, I am now using this functionality and it seems to be picking up the SPAM fairly well!

Doug Bissett:

--- Quote ---Search for ".-z" in Help, for me it comes up under the "ICSL Help" section.
--- End quote ---

So it does, Odd that I can't search for "-z" and find it. The docs say "-z", not ".-z" (could that be the problem?). This would seem to be some sort of a problem, that needs to be investigated. I will create a problem report. It could be the way that it is coded in the help file, or it could be a problem with searching in the help program.


--- Quote ---I am now using this functionality and it seems to be picking up the SPAM fairly well!
--- End quote ---

Many years ago, I learned that BogoFilter is a very good way to filter SPAM. I still use it, but I am pretty sure that my ISP has a pretty good SPAM filter too, so I never see SPAM any more. That concerns me in two ways. One is that I don't know if the ISP is filtering out good messages, and two, I can't test that Bogofilter is still working.

One tip: Try to train equal amounts of good messages, and bad ones. If you get it unbalanced, it doesn't work as well.

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