[pmmail-list] Spam filtering - popfile et al

[Maynard Riley]

Hi Dave,

I'll take this opportunity to say [again] how much I appreciate Luko's
code for checking RBLs with PMMail.
[http://www.willms-edv.de/freesoft/pmmail/blacklist.zip]

I'll add a comment that there are several valid reasons why NOT to
filter on content, which is what the baysean tools do. Content
filtering is frought with error. Spam is not about content. The same
content may be spam to you and joy to another. Reading and analyzing
all the body content (and attachments) is considerably more effort than
just analyzing headers. No need for bolus; no need for maintenance
tuning, ....

The good news is that the RBLs do a darn fine job of catching 95% of
the spam with fewer false positives than content filters.

my oh-two,

-- Maynard
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