I can't unsubscribe

My email gets flooded. How the hell do unsubscribe from this group.
The email that gets flooded is my hotmail account and not my gmail
account. It has become extremely annoying having to purge all these
beagleboard emails.

This e-mail address (pin.ism@gmail.com) is not listed as a subscriber. You'll need to find what address you subscribed with and send an unsubscribe message to beagleboard-unsubscribe@beagleboard.org from *that* address, as is mentioned at the bottom of *EVERY SINGLE E-MAIL* from this list.

I know it’s at the bottom of every single email. It just never worked for me. Fortunately, today my email finally went through without a hitch.