On Thu, 29 Sep 2022, Johnnie W Adams via Exim-users wrote:
Well, it's a moral victory. I did get the acl to do what I wanted and give
me only the final DKIM signature. No go. Then I turned back on the LISTSERV
DKIM service so I'd get a LISTSERV signature +followed+ by an SMTP
signature. That fails, too. I'm beginning to think DMARC wants mailing list
software to crawl off and die.
I don't know the details, but DKIM can be configured to sign that
there are multiple or zero instances of a header (so that if someone adds
that header later the recipient knows it isn't from you).
Do your messages to the list come through this process;
the exim list may have changed things again, but is it worth
looking at the DKIM headers in mail that we receive from you ?
As I received your message there were 3 DKIM-signature headers
DKIM-Signature
X-Google-DKIM-Signature
X-Mailman-Original-DKIM-Signature
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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