Large files(Excel) coming out of Reporting Services how can I compress them for email

I have a 29000 row spreadsheet coming out of Reporting Services that is producing a large file that we email. How can I create the most compact spreadsheet/file for scheduled daily emailing out of Reporting Services?

I'm pretty sure there isn't any built-in way to compress the report attached to an email in Reporting Services. There aren't really any tricks that you can use to reduce the size of the report generated, other than making sure that you use numbers instead of strings whenever possible -- numbers will generally take less space in the Excel format than strings. Depending on how you are sending the emails, you might be able to use some third party code or write your own code to compress the exported report and then mail it, but it isn't something that is part of RS.