Andrew C Aitchison via mailop skrev den 2024-05-05 18:49:
On Sat, 4 May 2024, Alessandro Vesely via mailop wrote:
The last URL in the response says something about ARC:
ARC checks the previous authentication status of forwarded
messages.
If a forwarded message passes SPF or DKIM authentication, but ARC
shows it previously failed authentication, Gmail treats the message
as
unauthenticated.
Isn't it overkill to put both DKIM /and/ ARC if you know the receiver
implements both?
I don't think so.
DKIM proves that you did send it.
ARC proves that you forwarded what you received ?
without trustness ?
ARC-signer/ARC-Sealers have to be trusted, to make any different
is arc btw ensure tested in dmarc ?, trustness or ?
In this case GMail can see that you forwarded the mail,
but cannot prove that it really came from the original sender.
I think that this way GMail can reject the email,
or put it in the spam folder, but without blaming you.
gmail users should stop using gmail, problem solved
I am not sure that ARC is supposed to do what we think it is.
if you run all without trustness nothing works
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