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5.7.0 Other or undefined security status

The message was refused for a security or policy reason that the server did not specify with a more precise code.

5.7.0 Other or undefined security status

Permanent: retrying will not help

The message was refused for a security or policy reason that the server did not specify with a more precise code.

Usual causes
  • A policy on the receiving side, such as a blocklist, a content rule, or an authentication requirement.
What to do
  • Read the text after the code. It normally says which policy.
  • Check your SPF, DKIM and DMARC records, and whether your domain or IP address is on a blocklist.

Usually the fault of: either.

Common questions.

What does 5.7.0 mean?

The message was refused for a security or policy reason that the server did not specify with a more precise code.

Will retrying fix 5.7.0?

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 5.7.0?

Read the text after the code. It normally says which policy. Check your SPF, DKIM and DMARC records, and whether your domain or IP address is on a blocklist.

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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