452: Insufficient Storage (Temporary)

The 452 SMTP error means the receiving server has run out of storage space temporarily. Learn what causes 452 errors and when delivery will be retried.

Published · Last verified · Maintained by TamingDNS

🟡
Temporary Failure (Soft Bounce)
SMTP Code
452
Category
Insufficient Storage (Temporary)
Frequency
Common

💬 What This Error Means

The receiving server doesn't have enough storage to accept your message right now. This is temporary and should resolve as the server frees up space.

Common Causes

  • Server disk quota temporarily full
  • Message queue at capacity

How to Fix This

  • Your server retries automatically
  • If this persists, the recipient mail server may have a serious capacity issue

📚 Official Documentation

↗ RFC 5321: SMTP

📋 Real-World Example Messages

These are real bounce message formats you might receive. Paste yours into the Bounce Decoder for instant analysis. 

452 Insufficient system storage
452 4.3.1 Insufficient system resources

🔗 Related Error Codes

451
Local Processing Error (Temporary)
421 4.3.2
System Not Accepting Mail
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