I'd suggest you turn off recipient filtering and do recipient filtering in your event sink. The event sink that I've written for catchall e-mail addresses shows you an example on how to do that: http://blogs.brnets.com/michael/archive/2005/12/28/1894.aspx To make your sink do what you want is pretty difficult (well, in comparison to a OnArrival vbscript sink). You have to rewrite it to a protocol sink and the rules for that are a little harder. And (as far as I know) can't be done in vbscript. For more detailed information you should take a look at the Exchange SDK. ________________________________ From: William Holmes [mailto:wtholmes@xxxxxxxxxxxxxx] Sent: Monday, February 27, 2006 11:10 PM To: [ExchangeList] Subject: [exchangelist] Envelope Rewrite Sink With Exchange 2003 SP2 http://www.MSExchange.org/ Hello, I have an event sink that rewrites envelope addresses in the form of user+something@xxxxxxxxxxxx to user@xxxxxxxxxxxxx Where anything between the + and the @ is considered a comment. Under Exchange 2003 SP2 with Recipient Filtering Enabled with Filter Recipients who are not in the directory enabled this filter does not work. The question I have is can I hook an my event sink into the SMTP server prior to the Recipient Filter so the address is rewritten prior to the Recipient Filter's check. I register the sink using the smtpreg.vbs script from Microsoft using the following command. cscript smtpreg.vbs /add 1 onarrival AddressRewrite CDO.SS_SMTPOnArrivalSink "Mail FROM=*" Could someone suggest where to register a sink that can work in the way I would like it to. Bill ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange <http://www.webelists.com/cgi/lyris.pl?enter=exchangelist%0bExchange> Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You <http://www.techgenix.com%0b-------------------------------------------- ----------%0bYou> are currently subscribed to this MSExchange.org Discussion List as: michael@xxxxxxxxxx To <mailto:michael@xxxxxxxxxx%0bTo> unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report <http://www.webelists.com/cgi/lyris.pl?enter=exchangelist%0bReport> abuse to info@xxxxxxxxxxxxxx