Dynamic SSRS Names for Email Signatures

We transfer our reports from Crystal Reportsto SSRS. In Crystal Reports, we use variables to dynamically generate our file names, so when a report is sent by email, the file has a report name and a due date. (e.g. MonthlyReport09-07-2012.xls).

Is this possible in SSRS? I do not see a direct approach to using variables in the file name when subscribing to a report. This can be difficult when sending multiple reports with the same file name to one person, because it would be difficult to determine which report is the one.

Any help is appreciated. Thanks you.