On 2015-07-15 13:53, David Jones wrote:
I have seen Microsoft Exchange servers use the header From: domain
instead of the envelope-from but this does not follow RFC 4408 spec.
On 15.07.15 15:06, Dave Warren wrote:
This is valid under Sender-ID, which was Microsoft's attempt at SPF
version 2. It has since died a (deserved) death, and such use should
be depreciated. However, if you don't have an explicit spf2.0/pra
record, Sender-ID suggested using the v=spf1 record instead (which
obviously causes issues)
If you want to avoid these tests, add this as a TXT record:
"spf2.0/pra" or "spf2.0/pra ?all"
Better not. Don't jump on dead horse. Microsoft SPF/2 is dead, let it die
and don't even try to fix things by implementing it, since may break things
working properly.
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