550 5.7.1
550 5.7.1 Spam Policy Rejection
SFR rejected the message because the content or domain violates its spam policy.
550 5.7.1 indicates SFR’s filters still see risky behaviour after multiple deferrals. Permanent remediation is required before sending resumes.
Severity
ERROR
Provider
SFR
Last Reviewed
2025-06-01
How to Fix 550 5.7.1
Follow these steps to resolve this SFR SMTP error and restore normal delivery.
- ✓Audit content, links, and headers for spam-like characteristics.
- ✓Remove recent imports or unverified purchases from French lists.
- ✓Share remediation actions (complaint reduction, authentication fixes) when contacting SFR support.
- ✓Resume gently with a small, high-engagement segment once trust improves.
Helpful Resources
More SFR SMTP Codes
Keep these related troubleshooting guides handy while addressing 550 5.7.1.
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