On 2024-06-23 at 19:19:49 UTC-0400 (Mon, 24 Jun 2024 07:19:49 +0800)
Jeff Peng via Postfix-users <j...@simplemail.co.in>
is rumored to have said:

what's the mainstream milter server for customized content analysis such as headers and languages? I may want to block some special messages which have a special header or special language (like middle-east).

I don't know what you consider qualifies as "mainstream" but if you need customized analysis, the most widely used FOSS milter for that is MIMEDefang, which has a rewrite by the original author (Diane Skoll, also author of the Perl MIME::Tools package) called MailMunge which has identical functionality. Because MIMEDefang is 20+ years old, it is quite mature and stable. MailMunge has a better code design, but it is not as widely used.

Both of those can support multiple AV tools as well as SpamAssassin, (which itself does limited language detection) but most notably they use a collection of Perl subroutines as their site configuration, so that you can do anything with messages that you can code (or find code for) in Perl.


--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo@toad.social and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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