John Sweet writes:

 > That's not an integration test. It's all automated. The answer you
 > want is, "Can I make money now?" This is how you get the
 > answer. The DMARC record is only part of the story, whether
 > recipients act on it or not is just as important.

Well, for Author Domains publishing "p=reject", we can certainly
confuse the issue dramatically.  Change the protocol to advocate
"silent discard" instead of "return to sender", and then probing gives
spammers no idea whether domains are discarding or delivering, and
they have no data on their conversion rate for spams received.  They
don't want to report what they see (victims/sent, much lower than
victims/(sent - rejected)), and any numbers they have to support
higher estimates are for other domains or growing stale.

Author Domains receive a report, they can see if their users are
losing mail and let them know.  Keep a copy for a few hours until the
report gets back if they don't trust their users to do so.

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