[exim] Re: fakereject and DSN

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Autore: Jeremy Harris
Data:  
To: exim-users
Oggetto: [exim] Re: fakereject and DSN
On 19/08/2023 16:29, Victor Ustugov via Exim-users wrote:
> But
> this won't work if there is no Message-ID header in the original email.


You can safely block any external-source messages lacking a
Message-ID header (local ones, where you're being an MSA,
not so; some MUAs are dumb and the MSA has to fix then up.
Exim does that).

RFC 5322 only lists this as a SHOULD (section 3.8.4) -
but I see it as spamsign.
--
Cheers,
Jeremy


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