What is

What is DMARC

DMARC is a TXT record at _dmarc plus the domain. It tells the receiver what to do when the From address is not aligned with a passing SPF or DKIM result, and where to send the reports.

_dmarc.example.com. IN TXT "v=DMARC1; p=none; rua=mailto:[email protected]"

p is none, quarantine, or reject. none asks the receiver to take no specific action on delivery. The record name in the example is the one RFC 7489 specifies.