On 8/13/25 10:24, Laura Atkins wrote:
MS says both SPF fail and DKIM fail in different cases - I’ve seen both
happen. I missed the part where SPF was actually failing (as opposed to
just MS being unable to do basic inbound mail authentication).
If it really is SFP failing then you may want to try SRS? I dunno how
well that will work but it might help. Microsoft makes some rather
challenging and hard to understand decisions about how they filter mail
but experience suggests they are resistant to changing those decisions.
The error from MS indicates that it's SPF for the domain in the From
header that is failing (and that is true). SRS is specified as a
solution to "fixing" SPF for the envelope address, and we do in fact do
SRS rewriting of the envelope. I don't think we want to go down the path
of having to SRS rewrite From headers.
--
BR/Mvh. Dan Malm, Systems Engineer, one.com
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