pfqueue provides a console (ncurses) interface to Postfix 1, Postfix 2 and Exim mail queues. It is a real-time queue scanner that shows per-queue lists of existing messages; the messages can be deleted, put on hold or released. For example, it may be useful to inspect a traffic jam at a given time, to see what is falling into and unexpectedly crowding your deferred queue. Marcus Alves Grando