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From: om@iki.fi (Otto J. Makela)
Newsgroups: comp.mail.sendmail
Subject: Re: Sendmail and DKIM for bounce messages?
Date: Wed, 19 Mar 2025 17:43:35 +0200
Organization: Games and Theory
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Marco Moock <mm@dorfdsl.de> wrote:

> On 19.03.2025 14:46 Uhr Otto J. Makela wrote:
>> As I said, clients have added our sendmail-based server (smarthost) in
>> their SPF record (SPF does not come into play with the mail generating
>> servers that are hosted with us, we use a simple IP-address based
>> access table to permit them to send emails to our smarthost).
>
> If MAIL FROM: is <>, the SPF will be checked against the hostname in
> EHLO. Check which hostname is being used there and create and SPF for
> it.

Dammit, should have remembered that.
I've now added the appropriate SPF record, let's see if it makes a difference.
-- 
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