Just had an occurance where an employee was under our 20mb attachment limit, but sent it to practically the entire company which brought the network to a screaming halt. Is there a way in Exchange to limit the TOTAL attachment size which caculates in the number of recipients ie. a 10mb email maxes out at 100 recipients = ~1 gb. We outsource our Exchange server and they are saying this isnt possible, but it seems like it should be. Do they just not know how? I also assume there is a way to stop an email that is sent to everyone with a large attachment? It took 8 hours before the network speed was finally back to normal...outsourced company said there was no way to stop the email form being distributed.