On 02/06/2020 16:42, Ken O'Driscoll via mailop wrote:
Without seeing the actual message my guess is that the *aspf=s* is the
problem. This is telling receivers that you want to enforce strict SPF
alignment, which means the FQDNs used the SPF tests must match. So, if
your 5321.From is using a sub-domain then this will fail a DMARC test
in the absence of DKIM.
I think this.
and I guess the domain in the HELO too?
And the envelope sender.
We have no problems sending IPv6 email to google. With DKIM, SPF and
reverse DNS, it just worked. I'm not sure what we do right, but it is
possible to have it working.
--
Tim Bray
Huddersfield, GB
t...@kooky.org
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