Wiki Piratenpartij

Een zender van een e-mail naar een niet bestaande maillijst krijgt en bounce e-mail terug met de inhoud:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  somemaillist@lists.piratenpartij.nl
    Unrouteable address

Reporting-MTA: dns; mail.piratenpartij.nl

Action: failed
Final-Recipient: rfc822;somemaillist@lists.piratenpartij.nl
Status: 5.0.0

A DMARC policy can be set to none, quarantine or reject, depending on the level of DMARC enforcement you want to opt for. Here, p is the parameter that specifies DMARC policy:

• The none policy (p=none) is relaxed and provides zero enforcement, as every email that is received by the recipient’s email server lands into their inbox, whether or not they fail authentication.
• The quarantine policy (p=quarantine) provides DMARC enforcement as the domain owner can prompt the receiver to roll back emails into the spam folder in case the message fails DMARC authentication.
• The reject policy (p=reject) ensures that all emails that fail authentication are not delivered to the receiver’s inbox, thereby providing absolute enforcement.