Glossary
Email authentication
ruf (failure reports)
The DMARC tag naming where per-message failure reports should be sent. Because these can contain message content, most large receivers do not send them at all.
Defined in RFC 7489 §7.3.
Where this appears
The lessons that use this term, and what each is for.
Email Authentication FundamentalsThe policy record, tag by tagRead any DMARC record and state exactly what it asks receivers to do.DMARC PractitionerEvery tag, including the unused onesWrite a policy record in which every tag is there for a reason you can state.DMARC Practitionerfo, and what each value asks forRequest the failure reports you want, and predict how few you will receive.DMARC PractitionerWhy almost nobody sends themExplain why a valid ruf address receives nearly nothing, and decide whether to publish one.