On Thu, Jun 04, 2026 at 02:40:47PM -0700, Randolf Richardson, Postmaster wrote:

>       DKIM signatures (and also ARC signatures) are different with each 
> message (which just means it's being signed later in the process).

This topic is also being discussed on the exim-users mail list. I received one
email 3 times and summarised the differences between them on that list. One was
a few bytes longer than the other two:

Differences entirely in the headers:

• Envelope From line (first line) the time differs

• Delivery-date: time differs

• First Received:
•• 'from' -- sent by google machine
•• 'id' -- differs (this is the id generated by my exim)
•• time differs

• Second Received: google machine, time, id

• ARC-Seal: t=xxx b=xxx differs

• ARC-Message-Signature: b=xxx differs

• DKIM-Signature: t=xxx x=xxx b=xxx differs

• X-Google-DKIM-Signature: t=xxx x=xxx b=xxx differs

• X-Gm-Message-State: value differs

• X-Gm-Gg: value differs. It is this value that is a different length in one of
the email

>       I do hope that Google gets the problem resolved soon. :)

Is there anyone from good reading this ?

Which MTAs does it affect, ie other than Exim ?

-- 
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT 
Lecturer.
+44 (0) 787 668 0256  https://www.phcomp.co.uk/
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