Microsoft KB Archive/99854

= SMTP: Err Msg: 500 Huh? =

Article ID: 99854

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Mail Gateway to SMTP 2.1
 * Microsoft Mail Gateway to SMTP 3.0

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This article was previously published under Q99854



SYMPTOMS
Versions 2.1 and 3.0 of Microsoft Mail Gateway to SMTP may display this message:

500 Huh?



CAUSE
This error message indicates that an unknown SMTP command was received by the gateway. After sending this error message, the SMTP Gateway usually closes the connection.



RESOLUTION
Check the SMTPGATE.LOG file to find the command that the SMTP did not understand. Then, contact the sending host to ascertain why the command was given.

Additional query words: 2.10 3.00 alert errmsg

Keywords: KB99854

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