Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool tries to send a message to the Postmaster account for the Simple Mail Transfer Protocol (SMTP) domain by performing the following tasks:

• Opening a socket connection to the SMTP server. If the Exchange Server Analyzer receives a response code of 220, this step is considered to have completed successfully.
  
  
• Transmitting the EHLO SMTP command verb. If the Exchange Server Analyzer receives a series of response codes of 250, including a response that includes 250-X-LINK2STATE and 250-XEXCH50, this step is considered to have completed successfully.
  
  
• Transmitting the MAIL FROM: ExBPA-MailAcceptTest@Fabrikam.com SMTP command verb. If the Exchange Server Analyzer receives a response code of 250, this step is considered to have completed successfully.
  
  
• Transmitting the RCPT TO: Postmaster@<domainname>.com SMTP command verb. If the Exchange Server Analyzer receives a response code of 250, this step is considered to have completed successfully.
  
  

If the Exchange Server Analyzer cannot successfully complete all steps, an error is displayed. The error indicates that there may be a general mail flow issue. The following links are listed in the order in which you should troubleshoot, starting at the server level and working out to the network level.

To correct this error

For more information about the Postmaster account in Exchange Server, see the following Microsoft Knowledge Base articles:

• 223860, "XCON: SMTP Postmaster Mailbox Must Be Set Manually" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=223860)
  
  
• 313832, "HOW TO: Set an SMTP Postmaster Account in Exchange 2000 Server" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=313832)
  
  

© 2009 Microsoft Corporation. All rights reserved.