550 5.7.0: Message Rejected (Policy)
The 550 5.7.0 bounce means the email was rejected by a security or spam policy. Learn what triggers this and how to fix it.
Published · Last verified · Maintained by TamingDNS
550
5.7.0
Message Rejected (Policy)
Common
🔢 Enhanced Status Code Breakdown: 5.7.0
| Component | Value | Meaning |
|---|---|---|
| Class | 5 | Permanent failure (Hard bounce) |
| Subject | 7 | Security or policy |
| Detail | 0 | Message Rejected (Policy) |
Per RFC 3463 Enhanced Mail System Status Codes. Class (X) = severity, Subject (Y) = category, Detail (Z) = specific condition.
💬 What This Error Means
Your email was rejected by a policy filter. This broad rejection can cover spam filtering, content policies, IP reputation blocks, or a sending rate issue.
Common Causes
- Content triggered a spam or content filter
- Sending IP or domain has a poor reputation
- Domain-level policy rejection
How to Fix This
- Review your email content for spam indicators
- Check your sender reputation with our Blacklist Checker
- Verify your authentication records with our Domain Checker
📚 Official Documentation
📋 Real-World Example Messages
These are real bounce message formats you might receive. Paste yours into the Bounce Decoder for instant analysis.
550 5.7.0 Our system has detected that this message is likely unsolicited mail 550 5.7.0 Message rejected due to policy
🔗 Related Error Codes
🔧 Related Diagnostic Tools
These tools can help you diagnose and fix this type of bounce:
🔧 This Bounce Is Related to Email Authentication
Fixing this type of bounce requires correctly configured SPF, DKIM, and DMARC records. Our free Domain Checker analyses all three in one scan and tells you exactly what to fix.
Run a Free Domain Authentication Check →Got a bounce message to decode?
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