[Exim] Scalability

We have 1400 users happily using exim. We've implemented it about 8 months
ago. Currently we are having issues with our email servers capacity. There
is 30+GB of mail stored there. Here is a scenerio: One user has a humerous
picture and decides to email it to all-staff@???. The picture
is 1MB in size. The disk usage has just increased on our mailserver 1.4GB
because of that one picture (1MB x 1400 users = 1.4GB). Is there anyway
around this nightmere?

Any help is greatly appreciated,
Joe Kezar
Linux Systems Administrator
Vermont Department of Corrections
(802)241-2314