We are using Google Apps for our enterpise email and any email forwards we create we set via a Google group.  In creating an Email Service (using the basic unsubscribe example), sending an email directly to the email generated by Google, the really long ugly one  works fine.  However, adding that email the Google group (for example, unsub at <some domain> dot com and forwarding it, does not work.

Any ideas why this is not working?  I added my own email to the group and the message comes through complete and as expected.