Prevent outgoing spam with DMARC Print this Article
Add a DMARC record
DMARC Records are published via DNS as a text(TXT) record. They will let receiving servers know what they should do with non-aligned email received from your domain.
Domain-based Message Authentication, Reporting, and Conformance (DMARC) is a mechanism for improving mail handling by mail-receiving organizations. The ultimate purpose of DMARC, according to RFC-7489 is to provide a “mechanism by which email operators leverage existing authentication and policy advertisement technologies to enable both message-stream feedback and enforcement of policies against unauthenticated email. Email originating organizations utilize DMARC in order to express domain-level distribution policies/preferences for message validation, disposition, and reporting.
How DMARC Works:
DMARC adoption has risen dramatically and has a positive or negative impact on your email delivery. All of the major email providers support DMARC. By some measures, 80% of mailboxes worldwide are protected by DMARC.
DMARC dramatically improves on SPF and DKIM by letting you:
- Monitor, detect and fix real world problems with your SPF and DKIM configuration
- See the email volumes you’re delivering to inboxes
- Identify threat emails pretending to come your domain. (Spoofing)
- Control the delivery of your email and defend against spoofing attacks.
How do I set it up?
It only takes a few minutes to get started with DMARC and you’ll see immediate benefits. The first thing you need to do is add a simple DNS record to enable DMARC reporting. If you would like MxToolBox to handle your DMARC reporting for you, just add this simple text (TXT) record to your domain’s DNS.
Google has a great guide on what details are required here:
Check the status of your domains DMARC with mxtoolbox here and select DMARC lookup.
You can use the Zone Editor within cPanel to add a new txt record for DMARC.
What is DMARC Authentication?
To pass DMARC authentication, a message must both Pass and Align for either SPF or DKIM. Even if a message passed authentication for both SPF and DKIM, it could still fail DMARC authentication if one of them does not "align".
There are two ways to pass DMARC authentication:
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