mailˈ-cart, mailˈ-coach, mailˈ-car, mailˈ-carriage, mailˈ-drag or mailˈ-gig noun

1. A cart, etc, formerly used to carry the public mail
2. A small hand-cart, with long handles, for the conveyance of children

mailˈ-catcher noun

An apparatus for catching mail-bags thrown from a moving train

mail drop noun

1. A receptacle for mail (N American)
2. A delivery of mail, circulars, etc

mailˈ-in noun (esp N American)

Circulation of surveys, etc, by post

mailing list noun

A list of, or computer file containing, the names and addresses of those to whom advertising material, information, etc, is to be posted

mailing machine noun

Any of various machines used in an office to seal, address, frank, etc, outgoing mail

mailˈman or mailˈ-carrier noun (N American)

A postman

mailˈmerge noun

(a computer program for) the producing of a series of letters addressed to individuals by merging a file of names with a file containing the text of the letter (also intransitive verb)

mail order noun

An order for goods to be sent by post

mailˈ-order adjective

mailˈ-out noun

A bulk sending of mail, a mailshot

mailˈ-plane, mailˈ-train or mailˈvan noun

An aeroplane, train or van that carries the public mail

mailˈroom noun

A room in an office, etc, for dealing with incoming and outgoing mail

mailˈshot noun

An item of unsolicited, usu advertising, material sent by post (also transitive verb)