Title: SMTP Event Sinks - A window into Exchange integration (Part 1). Author: Alex Zammit Summary: If you installed Exchange integrated applications such as anti-virus, anti-spam, or custom disclaimers there is a good chance that you installed an SMTP event sink. As from IIS5 and Exchange2000 event sinks played a key role in a wide variety of applications. IIS6 and Exchange 2003 kept the same interfaces re-enforcing this trend. You may read these articles for a better understanding of event sinks and common troubleshooting techniques. Link: http://www.MSExchange.org/pages/article.asp?id=602