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550 5.7.1 — Sender mismatch

address d, sender is not the authenticated account or is not authorized to send

TopicComputer error codes → About 1 min read

550 5.7.1 —20er mismatch

Field: SMTPPriority: High

What does this error mean?

address of sender is not the authenticated account or is not authorized to send.

Probable causes

  • Field From different from SMTP account
  • Alias without right of shipping
  • Anti-USURPATION POLICY

Verification and resolution

  1. Align the From address with SMTP account
  2. Add rights Send as
  3. Check the mail provider’s rules

Precaution: Do not bypass this protection with a falsified address.

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Related resources

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