Re: [exim] anti-spam pointers please

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Auteur: Niels Dettenbach
Datum:  
Aan: Rory Campbell-Lange, Larry Rosenman, exim-users, Exim-users
Onderwerp: Re: [exim] anti-spam pointers please
Am Dienstag, 2. April 2019, 09:20:26 CEST schrieb Rory Campbell-Lange via
Exim-users:
>     required_score 3.0

this is very low from my experience (if you work with "default" SA setup -
especially if you enabled most of the available extensions). This typoically
leads to a lot of false positives if you have a typical SA setup. If you have
most extensions disabled, then 3.0 may be "fitting", but then SA could not
recognize spam well, because it has not much facts to decide / value a email.

SA default is 5.0 which is a good value for "typical" personal usage. 2.5-3.0
is more typical for greylisting or similiar more "soft" limits.

Typcial values in multi-user environments are around 5.0-7.0, while every 0.1
is important. If you go under 5.0 you (very) propably will loose some ham. On
a machine with around 200.000 SMTP sessions per day i tweaked the score over
monthes in a range of 0.4 to find working results.

With further own extensions (or score "additions" in EXIM) the score could
rise further - so even a bit higher values may required.


hth a bit,
best regards,


niels.


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Niels Dettenbach
Syndicat IT & Internet
http://www.syndicat.com
PGP: https://syndicat.com/pub_key.asc
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