In addition to Alex's response, On 16/01/2021 02:25, Konstantin Boyandin via Exim-users wrote:
As far as I understood, the above only filters by the address reported in "MAIL FROM" SMTP command
Yes
(i.e., by Return-Path),
Possibly added by a transport - not necessarily present in an incoming message
which can be bogus.
Anything in an inbound message can be bogus - including the From: header. It's just as easy to forge as the envelope FROM. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
