Am 13.08.2018 um 01:29 schrieb Stuart Longland:
> We have a problem where some smart-arse spammers/phishers are spoofing
> the From address, specifying our domain as their from address.  In one
> case, the person in question uses my personal address in the From, To
> and Return-Path.  In others, they pretend to be a scanner sending a
> supposedly "scanned document".

setup SPF, there you can define which host is allowed to send emails
from your domain.
The check will be done on the mailserver receiving the "faked" emails.

Gruß
Matthias

-- 

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the universe trying to
produce bigger and better idiots. So far, the universe is winning." --
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