W dniu 24.09.2020 o 03:10, CM Poncelet pisze:
All software filters are fundamentally flawed, because they presume to
recognize and 'understand' what is or not SPAM - which is logically
impossible. The only reliable filter is the hardware one, which assumes
by default that every received email is SPAM *unless* a message filter
rule says it is legitimate. That is how ACF2 enforced security - by
denying any access to a resource unless an ACF rule permitted it.
How do you create whitelist?
What if phony email conform the rules?
No, spam-nospam decision is "fuzzy logic". Commercial filters may use
some input from provider, something like virus definition. There are
some popular spam (or malicious msg) messages with some characteristics.
BTW: RACF does it better than ACF2 - while it is possible to deny by
default, usually the decision is left to resource owner, who knows
better what to do. ;-)
--
Radoslaw Skorupka
Lodz, Poland
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