5.7.509 Access denied, sending domain does not pass DMARC verification

A receiver (Gmail uses this wording) rejected the message because the From domain publishes a DMARC policy that asks receivers to reject mail that fails, and this message failed.

5.7.509 Access denied, sending domain does not pass DMARC verification

Permanent: retrying will not help

A receiver (Gmail uses this wording) rejected the message because the From domain publishes a DMARC policy that asks receivers to reject mail that fails, and this message failed.

Usual causes

The message was sent through a service that is not set up to sign or authorize mail for your domain.
SPF and DKIM pass, but not for the same domain as in the From address (misaligned).

What to do

Make sure every service that sends as your domain has its own DKIM record in your DNS, and is covered by SPF if it uses your domain in the return path.
Look at your DMARC reports to see which senders fail, and fix them before tightening your policy.

Usually the fault of: sender.

Common questions.

What does 5.7.509 mean?

A receiver (Gmail uses this wording) rejected the message because the From domain publishes a DMARC policy that asks receivers to reject mail that fails, and this message failed.

Will retrying fix 5.7.509?

No. It is a permanent failure, so retrying the same message will not help, and repeated attempts can hurt your sending reputation. Fix the cause first.

How do I fix 5.7.509?

Make sure every service that sends as your domain has its own DKIM record in your DNS, and is covered by SPF if it uses your domain in the return path. Look at your DMARC reports to see which senders fail, and fix them before tightening your policy.

Other codes: 5.1.1 · 5.1.2 · 5.1.3 · 5.1.6 · 5.2.1 · 5.2.2 · 5.2.3 · 5.3.4 · Decode a whole bounce message

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