Re: What breaks the validity of DKIM signature?

"Thomas Barth via users" <[email protected]> Mon, 22 Dec 2025 12:21:25 +0100
Newsgroups gmane.mail.spam.spamassassin.general
Message-ID <[email protected]>
Hi,
just a quick update. The size of the email is not the reason. Amavis 
transmits emails completely. The limitation ($sa_mail_body_size_limit = 
200*1024; ) is probably intended for its own checks.
I used the content of the firstmallorca email as a template for a new 
email and sent it via my servers. DKIM is valid for opendkim and SA 
DKIM. A diff between the raw email (stored after opendkim) and the email 
stored at the end also showed that only a Delivered-To and a Received 
line were added to the header. So there must be a special case that 
occurs when such a news email is sent via Mailchimp, which unlike 
opendkim the DKIM check used by SA cannot handle.

When I got a mail confirmation from firstmallorca, the mail was sorted 
into the junk folder too:

Authentication-Results: mx1.txbweb.de; dmarc=fail (p=reject dis=none) 
header.from=firstmallorca.com
Received: from backend.firstmallorca.com (backend.firstmallorca.com 
[88.99.212.108])
But spf is "v=spf1 include:_spf.google.com ~all"

I think I have to configure more tolerance for "spanish" mails :)

Best regards
Thomas B.