Hi all, Exchange 2003 SP2/windows 2003 Is this still recommended way to disable "Allow non-delivery reports" to combat reverse NDR attack? What are drawbacks if we disable? Thank you.

Recommended is probably too strong a word. I would always turn off NDRs for that very reason but it's always been entirely up to you. "SGryzbowski" wrote in message news:b129ccab-a6cf-484c-b497-c29395e14c87... Hi all, Exchange 2003 SP2/windows 2003 Is this still recommended way to disable "Allow non-delivery reports" to combat reverse NDR attack? What are drawbacks if we disable? Thank you. Mark Arnold, Exchange MVP.