Transport troubleshooting…


This article looks good.  It’s just been re-released and consolidates several other articles:


General troubleshooting for transport issues in Exchange 2000 Server and in Exchange Server 2003 http://support.microsoft.com/kb/257265


The article doesn’t mention ExTRA though.  You can use the ‘Microsoft Exchange Troubleshooting Assistant’ to troubleshoot mailflow.  It’s available for download here; http://go.microsoft.com/fwlink/?LinkId=55884