Re: DKIM signature rejected

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://[email protected]:465"
> 
> Any ideas?
> 
> 	matthias
> 
> ----- Forwarded message from pgsql-bugs Owner <[email protected]> -----
> 
> Date: Wed, 19 Feb 2025 09:11:16 +0000
> From: pgsql-bugs Owner <[email protected]>
> To: [email protected]
> 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, ✉ [email protected], 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.