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Error code

SMTP 554.57.1 — Rejected message for policy or security

The server has finally refused the message for a security or policy rule

TopicComputer error codes → About 1 min read

SMTP 554 5.7.1. — Rejected message for policy or security.

Domain: Email.Priority: High

What does this error mean?

The server has finally refused the message for a security or policy rule.

Probable causes

  • SPF/DKIM/DMARC
  • IP reputation.
  • content or blocked recipient.

Verification and resolution

  1. Read the text after 5.7.1.
  2. Control domain authentication.
  3. Checking Reputation and Log.

Precaution: The code alone is generic: the full text of the rejection is indispensable.

← Return to the basis of the codes of error

Related resources

Relevant topic Diagnose a rejected email in SMTP Diagnosing SMTP rejection from the exact code: server that refuses, 4xx/5xx, authentication, TLS, sender, recipient... Relevant topic 554 5.7.1 — Message rejected as spam The recipient server considers the message or the sender as undesirable Relevant topic SMTP 550 5.1.1 — Recipient address rejected The recipient address does not exist or is not recognized by the remote mail domain. Relevant topic SMTP The protocol used to send and transfer emails
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