Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Marco Moock <mm@dorfdsl.de>
Newsgroups: comp.mail.sendmail
Subject: Re: Sendmail and DKIM for bounce messages?
Date: Fri, 14 Mar 2025 10:40:21 +0100
Organization: A noiseless patient Spider
Lines: 19
Message-ID: <20250314104021.1ab0f5a6@ryz.dorfdsl.de>
References: <87ecz2gsa3.fsf@tigger.extechop.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Injection-Date: Fri, 14 Mar 2025 10:40:22 +0100 (CET)
Injection-Info: dont-email.me; posting-host="82e88848aabd8e1616eb50e0879646ea";
	logging-data="995092"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+ZS0VihCmyBFqIP8ds0LPb"
Cancel-Lock: sha1:wojwrYwyEW55GW5ZTkUZISbBiVw=
Bytes: 1577

On 12.03.2025 17:52 Uhr Otto J. Makela wrote:

> This means that messages will languish in the mail queue for days if
> the client's email systems (typically M365, Google or some such large
> email handler) will not accept them, and then cause double bounces.

Is SPF valid for those messages?
SPF records must exist for the hostname in the EHLO command.

IIRC it is possible to send bounces using valid SPF only, but this
might be different for different sites, as MS and Google seem to have
variable rules for different sites.

-- 
kind regards
Marco

Send spam to 1741798372muell@stinkedores.dorfdsl.de