How should the DMARC alignment checks be performed on messages that have
a null RFC5321.MailFrom?
This came to my attention because our reports from LinkedIn suggest that
when the bounce address is null, they check the SPF HELO Identity
instead. That seems reasonable, but I don't see anything about it in the
DMARC spec.
Franck, if you could weigh in on this it would be much appreciated.
I've asked our Ops folks to create SPF records for our outbound
hostnames, something we should have done long ago. Then I'll wait for
new reports from LinkedIn to see if that changes the SPF "fail" to "pass".
<csg>
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