Pen&Internet is debuting a St. Patty’s Day promo designed to make even a PDA-toting leprechaun a little green with envy. Since Pen&Internet’s recent 2-for-1 riteMail special was such a big hit, they’ve decided to extend it through St. Patrick’s Day. Through March 17, users qualify for Pen&Internet’s 2-for-1 Lucky Shamrock Special where they can receive two copies of riteMail for the price of one–including two 1-year service subscriptions.