Enhanced status code

SMTP error X.3.2

System not accepting network messages

Updated Jul 1, 2026

The short answer

System not accepting network messages Common cause: Destination server is overloaded, down, or under maintenance

Quick fix

Retry later or contact the receiving administrator

This code is written X.3.2 because the reason is the same whether the failure is temporary (a 4 first digit) or permanent (a 5). Read the first digit of your own bounce to know which applies.

How to fix it

Retry later or contact the receiving administrator

Related codes

X.3.0 Other or undefined mail system status X.3.1 Mail system full X.3.3 System not capable of selected features X.3.4 Message too big for system X.3.5 System incorrectly configured X.3.6 Requested priority changed
All SMTP error codes
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Most rejections come back to sender reputation.

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