Undelivered Messages Solution?

[Matt Kettler]

Mohammed Alli wrote:
> For everyone that's having the 'Undelivered Mail Returned to Sender' messages.  I think postgrey would be the solution.  Let me know what you guys think.
> 

Greylisting won't help with bounce messages coming in to your network.

Greylisting is only effective against systems that don't retry delivery. Any 
system that's smart enough to generate a bounce, is almost certainly smart 
enough to properly queue and retry mail.