How to block outbound read receipts from single address - ORF Forums

The corporate mailsystem: mixed Exchange 2003/2007
The Internet gateway: (seperate) Exchange2003 / ORF4.3
The general policy regarding DSN's is that any DSN should flow back to external senders.

Now, I want to block/drop outbound DSN's from a specific mailbox on the corporate mailsystem.
How can I achieve that in ORF? (all filters in ORF seem to target inbound mail, not outbound mail)

Best regards
Peter

i dont think ORF was ever designed to do anything about outbound mail...

but in EXCHANGE, you could create a transport rule (exchange management console > microsoft exchange > organization > hub transport > transport rules > new rule)

which says:
from "that user" and sent to users that are "outside the organization" and if the message type is "read receipt" (or other DSN) then "delete the message without notifying anyone" (or redirect it if you want

disclaimer: i dont work for ORF i'm just some guy

@Bryon: @Bryon: Thanks for your reply. I guess I'll go for Exchange to handle it. Thanks.
/Peter

Thanks for lining out the different scenarios regarding DSN's. To be more accurate about my setup, all the DSN's I want to filter in ORF, are generated by the back-end Exchange servers, by the servers or by clients accessing the servers. The DSN's are of types read-receipts (Disposition-Notification-To) or received-receipts (Return-Receipt-To) and the likes. They will all flow outbound, passing ORF.
I guess the solution described by Bryon will do fine.
/Peter