How to: Configure a Report Server for E-mail Delivery (Reporting Services Configuration)

http://msdn.microsoft.com/en-us/library/ms345234%28v=sql.105%29.aspx

Configuring a Report Server for E-Mail Delivery

http://msdn.microsoft.com/en-us/library/ms159155%28v=sql.105%29.aspx

How to: Create and Manage Subscriptions (Reporting Services in SharePoint Integrated Mode)

http://msdn.microsoft.com/en-us/library/bb283186%28v=sql.105%29.aspx