pushtheenvelope Be innovative Stretch limits Post office request? Play it safe? No Mail carrier's pun (part 3) Exceed normal limits Do some shoving at a post office box? Be edgy, in a way Advice to an aspiring stationer? as a mail sorter? Not play it safe Go to an extreme Be daringly innovative Quip, part 3 Test limits Refuse to accept limits Exceed normal boundaries Flaunt boundaries Exceed accepted limits