Hello, I just thougth once again on this.
Some of the senders of aggregate reports offer free mailboxes. Aggregate reports show that emails from a host to a provider of free mailboxes sometimes do not validate DMARC. The one provider sending emails opens a free mailbox on the receiver and then sends a secret copy of each, otherwise ordinary delivered email, to that special mailbox. Then the mails from that mailbox are downloaded, and the A-R header is checked. By this way the sender finds out, which messages exactly have failed DMARC validation. At the end the same information is obtained, that can be obtained by exchanging a failure report: which messages have failed. Has somebody done this? Why does it have to be that complicated? Regards Дилян _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
