A Mail Clerk sorts, distributes, and dispatches incoming, outgoing, and department mail timely and accurately; Sorts mail according to destination and type; Opens envelopes by hand or machine; Stamps date and time of receipt on incoming mail; Readdresses undeliverable mail bearing incomplete or incorrect address; Examines outgoing mail for appearance and seals envelopes by hand or machine; Stamps outgoing mail by hand or with postage meter.