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Orange SMTP Error Codes and Bounce Messages

Orange is a French ISP that offers free mailboxes to customers and registered non-customers. Once the mail is confirmed legitimate, false-positive blocks can be reported to Orange's abuse team.

SMTP 5011 response

A hard failure. The receiving server has refused the message for good and will not accept an unchanged retry without a change on the sending side. See SMTP 501 across every provider

SMTP 5503 responses

High severityView all

A hard failure. The receiving server has refused the message for good and will not accept an unchanged retry without a change on the sending side. See SMTP 550 across every provider

SMTP 5521 response

A hard failure. The receiving server has refused the message for good and will not accept an unchanged retry without a change on the sending side. See SMTP 552 across every provider

Orange bounce questions

›Why is Orange bouncing my email?

Orange is a French ISP that offers free mailboxes to customers and registered non-customers. Once the mail is confirmed legitimate, false-positive blocks can be reported to Orange's abuse team. Match the exact wording of your bounce to one of the 5 responses on this page to find the specific reason and fix.

›How do I improve deliverability to Orange?

Authenticate with SPF, DKIM and DMARC, keep your sending IP and domain reputation clean, mail only engaged recipients, and honour unsubscribes. Orange also publishes postmaster guidance, linked on this page.

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