Be sure to create an account dedicated for use with DocuShare's email agent feature.
Someday I'll twitter these ideas, they're so good.
You can create aliases for collections so you don't have to remember their handles.
For example, if you want to cc your email to "Testimonium, Inc.", give it an alias without any spaces included, such as "Testimonium".
Now you can enter <To: Testimonium> in the subject line of your email.
If you need to automatically redirect incoming email based on the sender or keywords, look to using the DocuShare Outlook Client in conjunction with Outlook Rules to copy or move your email to a specific collection.