What is DMARC?
The DMARC tool helps you protect your recipients and deter fraudulent mailing activity by implementing a DMARC policy. Starting with DMARC’s “observation mode,” we analyze compliance and suggest corrective action, ultimately guiding you towards a quarantine or reject policy.
DMARC allows mailbox providers to validate that mail claiming to be from a domain originates from valid sources for that domain. It further allows senders to specify how mail that fails validation should be treated.
There are three different DMARC policy types: None, Quarantine, and Reject.
|None||The Domain Owner requests no specific action be taken regarding delivery of messages.|
|Quarantine:||The Domain Owner wishes to have email that fails the DMARC mechanism check be treated by Mail Receivers as suspicious.|
|Reject:||The Domain Owner wishes for Mail Receivers to reject email that fails the DMARC mechanism check.|
We recommend that you begin with None (or “observation-only mode”), to gain a comprehensive understanding of your mail sources and your DMARC compliance, before increasing security. This approach ensures you don’t accidentally block legitimate mail sources.