SMTP.WS Microsite - Microsoft SMTP Service

Welcome to SMTP.WS

“Providing information about Microsoft SMTP Service”

 troubleshooting email issues with SMTPDiag

SMTPDiag is a handy tool for tracking down SMTP based issues.  I recently used in a newsgroup posting that was helpful along with a few other times at http://www.orcsweb.com.   It is definitely one of those tools worth having if you have to troubleshoot email issues. 

Bernard Cheah posting is helpful also.