SMTP Status
SMTP reply code & message analysis (being improved)
Read the class of an SMTP reply and enhanced status.
This tool is being improved. Reply/enhanced codes and the original message are shown; message-pattern cause classification is not available yet.
Usage guide & examples
Paste one server reply. The reply code, enhanced status and server message are separated. Only status classes are interpreted; message patterns and provider-specific root causes are not analyzed.
Console flow / input example
550 5.1.1 User unknown
Processed locally. No input is uploaded or stored.
Scope
The status class is interpreted locally. Provider-specific details such as 5.7.26 require that provider’s documentation; this is not a root-cause verdict.
Result
Where do I use this result?
The status class is interpreted locally. Provider-specific details such as 5.7.26 require that provider’s documentation; this is not a root-cause verdict.