I have SBS server managing the network, also running exchange from it. I use a 6MB/DSL service which is great for surfing but awfull for the upload, for example when I send blast emails, or heavy attachments the server suffers from it and bottlenecks all email trying to go through. To solve this I have to purge these emails from the QUEUE folder over at Server Management console.
I'm ordering a T1 and need advise configuring my SBS to use the T1 for mail handling and the DSL for regular internet surfing.
I have a temporary solution: have SBS use the T1 as the default gateway, and secondly manually configure the user's internet browsers to use DSL for surfing.