We are using Windows Small Business Server with Exchange 2007 and have some users who run PC's and some who run Mac Book Pro's. The MacBook Pro user is trying to send a zipped attachment, 8MB, and is receiving an error that the message is too large. I removed the size restrictions within the Exchange Server and we are still receiving that message. We have tried sending this from a PC and are able to get the message to go through. Any suggestions on the MAC/SBS Exchange settings?