Re: [exim] Trying to block by Reply-To/From headers match

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Author: Jeremy Harris
Date:  
To: exim-users
Subject: Re: [exim] Trying to block by Reply-To/From headers match
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

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