Will that automatically archive them? And besides, many sites that are necessary for doing business think luke+priceline@somewhere.com is an invalid email addr

Will that automatically archive them? And besides, many sites that are necessary for doing business think luke+priceline@somewhere.com is an invalid email address. (And all of Priceline's competitors agree, and Kayak/Hipmunk are meta-search engines so don't solve the problem.) That said, Priceline does allow you to unsubscribe from their marketing and only receive relevant emails, which is probably the ideal place to attack this problem.