20 Nov
2015
20 Nov
'15
4:27 a.m.
Rick Moen via luv-talk <luv-talk@luv.asn.au> writes:
My understanding: Because the sending IP has changed.
I might be missing something here, but the basic job of DKIM/DMARC or SPF is to provide a means of determining that the mail has arrived from an IP address authorised by the claimed sending domain's owner (what is in the internal SMTP 'From: ' header) as a legitimate sending point for outgoing mail.[1] The domain owner publishes this information in the domain's DNS.
I don't think DKIM actually cares what the sender's address is. Unlike SPF. Just as long as there is a good signature, and it can look up the signature in DNS, I think that is all that matters. -- Brian May <brian@linuxpenguins.xyz> https://linuxpenguins.xyz/brian/