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SMTP: Err Msg: 503 Bad Command Sequence

This article was previously published under Q99855
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
Versions 2.1 and 3.0 of Microsoft Mail Gateway to SMTP may display thiserror message:
"503 Bad command sequence"
This error message indicates that an SMTP command was received out ofsequence. After sending this error message to the calling host, theSMTP Gateway waits for another command.
Check the SMTPGATE.LOG file to find the offending command that causedthe error. Then, contact the sending host to determine why the commandwas given.
2.10 3.00 alert errmsg

Article ID: 99855 - Last Review: 10/30/2006 22:39:31 - Revision: 2.1

Microsoft Mail Gateway to SMTP 2.1, Microsoft Mail Gateway to SMTP 3.0

  • KB99855