On 02/24/2014 07:13 PM, Franck Martin wrote:
On Feb 24, 2014, at 8:26 AM, John Levine <[email protected]> wrote:
It is worth noting that any large scale spoofing via a poorly-secured
forwarder or independent sender would cause most receivers to cease
exempting them from DMARC processing anyway. This difficulty is largely
self-correcting.
Quite right. DMARC is just advice from a domain owner to a recipient,
and the best advice to give is whatever will make the recipients happy.
In particular, this does not include telling people to throw away
perfectly good mail just because it went via a path you don't control.
and neither party (sender or receiver) can fix.
at a reasonable cost.
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