DKIM signature rejected

[Jan Eden]

Hi Matthias,

in most cases, the DKIM signature is applied by the mailserver, so mutt
is not involved. The relationship between DKIM signatures and mailing
lists is specified in RFC 6377[1], and it has always been rocky.

That said, I was not aware that a signature could forbid an email being
resent through a mailing list, but this is what the rejection message
says.

- Jan

[1] https://datatracker.ietf.org/doc/html/rfc6377

On 2025-02-20 10:50, Matthias Apitz wrote:

> Hello mutt-experts,
> 
> I've got a reject of an email to a public PostgreSQL mailing list due to
> an issue with my DKIM signature. Attached below. I've sent a test email
> to my company mailbox to see my resulting DKIM signature. It's:
> 
> DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=unixarea.de
> 	; s=blu3434000; h=Content-Transfer-Encoding:Content-Type:MIME-Version:
> 	Reply-To:Message-ID:Subject:To:From:Date:Sender:Cc:Content-ID:
> 	Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc
> 	:Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:
> 	List-Subscribe:List-Post:List-Owner:List-Archive;
> 	bh=mUXCo4CB5VS0jsNsC2LeR8NOxLomD73G556GgsVmluA=; b=nlMvRnatrYiMjStI6F/rnF2zbZ
> 	DqqjgqpA4fezouBgwHPPz+VAN+msCPqY+I6oQa1B6eP5bNZhr9bi8UCvVvRmTWX+LC74GdzsYsfR9
> 	5zDhdwYSgxaU6fW4CbtGfhZT+v/lH+x2sPi3OEdBPIEdeuHstof32yzBm00xnRX0MttjZx8E9ReyG
> 	GHBKSuWo9f80m9Y4VamhplV99V5aMxJZOU+MNVU/Jfdj9h4Q5aMfEtwT+SOCPBBoze7wFOpXRvQOd
> 	MdYA7FtH3uUlpMn0FwqpopXHqTl7Xs+cKxT/AZwRnogqdwsFmQg3fMf0/Tr8gMAPGluXkdpC8kKog
> 	qw+9X8Sg==;
> 
> What could be wrong with this and how do I fix this. mutt is sending the
> mail to the SMTP server of my provider 1blu, i.e.  I have in ~/.muttrc:
> 
> set smtp_url="smtps://XXXXXX-guru@smtp.1blu.de:465"
> 
> Any ideas?
> 
> 	matthias
> 
> ----- Forwarded message from pgsql-bugs Owner <pgsql-bugs-owner at lists.postgresql.org> -----
> 
> Date: Wed, 19 Feb 2025 09:11:16 +0000
> From: pgsql-bugs Owner <pgsql-bugs-owner at lists.postgresql.org>
> To: guru at unixarea.de
> Subject: Your message to pgsql-bugs
> 
> Your message to pgsql-bugs with subject
> 
> Re: BUG #18817: Security Bug Report: Plaintext Password Exposure in
>  Logs
> 
> has been rejected by a moderator and will not be posted.
> The reason given for rejection was:
> 
> This email has a DKIM signature on the List- headers of
> the email, indicating that it is not allowed to pass this
> email on through a mailinglist.
> 
> Please ensure that emails you send to the list, and others
> hosted on the same server, allow re-sending on a mailinglist.
> 
> Fixing this is normally a configuration setting in either your
> own mail server, or that of your provider. Exactly how it is done
> depends on which software is being used.
> 
> ----- End forwarded message -----
> 
> -- 
> Matthias Apitz, ✉ guru at unixarea.de, http://www.unixarea.de/ +49-176-38902045
> Public GnuPG key: http://www.unixarea.de/key.pub
> 
> Annalena Baerbock: "We are fighting a war against Russia ..." (25.1.2023)
> 
> I, Matthias, I am not at war with Russia.
> Я не воюю с Россией.
> Ich bin nicht im Krieg mit Russland.