421 4.7.0: Temporary Policy Rejection
The 421 4.7.0 soft bounce is a temporary policy rejection, often from Google. Learn what triggers it and how to fix rate limiting or new IP issues.
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421
4.7.0
Temporary Policy Rejection
Very Common
🔢 Enhanced Status Code Breakdown: 4.7.0
| Component | Value | Meaning |
|---|---|---|
| Class | 4 | Temporary failure (Soft bounce) |
| Subject | 7 | Security or policy |
| Detail | 0 | Temporary Policy Rejection |
Per RFC 3463 Enhanced Mail System Status Codes. Class (X) = severity, Subject (Y) = category, Detail (Z) = specific condition.
💬 What This Error Means
The receiving server has put your email on 'hold' for a moment. This is a temporary pause, often because you're sending from a new IP address or your reputation is still being established. It's a standard safety check used by major providers like Google.
Common Causes
- Your sending IP address is new and doesn't have a history yet
- You've recently increased the amount of mail you're sending
- A temporary "spike" in your sending triggered a safety limit
How to Fix This
- Be patient. Your mail server will automatically try again in 10-30 minutes
- If you're sending bulk mail, make sure to spread it out over a few hours
- If you've just moved to a new mail service, follow their "warm-up" guide to build your reputation
📚 Official Documentation
Google 421 4.7.0 is a generic temporary hold, often for new IPs or reputation concerns. Back off and retry.
📖 Google Workspace / Gmail documentation → Browse all Google Workspace / Gmail error codes →📋 Real-World Example Messages
These are real bounce message formats you might receive. Paste yours into the Bounce Decoder for instant analysis.
421 4.7.0 Try again later, closing connection 421-4.7.0 Our system has detected an unusual rate of unsolicited mail
🔗 Related Error Codes
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