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  1. E

    Issue DMARC p=reject causes locally generated DSNs (MAILER-DAEMON) to be silently discarded

    On a Plesk mail server with DMARC enabled, we observed that locally generated non-delivery notifications (DSNs) are being rejected when the domain uses a strict DMARC policy: v=DMARC1; p=reject; sp=reject; When an outgoing email fails, Postfix generates a local DSN: From...
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