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Mail exchanger

A server running SMTP Message Transfer Agent software that accepts incoming electronic mail and either delivers it locally or forwards it to another server. The mail exchanger to use for a given domain can be discovered by querying DNS for Mail Exchange Records.


Read Also:

  • Mail exchange record

    messaging (MX Record) A DNS resource record type that says which SMTP server handles electronic mail for a particular domain. E.g. the MX record foo.co.uk. 1054 IN MX 10 mail.foo.co.uk. means that mail for an address like “denis@foo.co.uk” should be sent to “mail.foo.co.uk”. There can be several servers for a domain. The “10” is a […]

  • Mail exploder

    messaging Part of an electronic mail delivery system which allows a message to be delivered to a list of addresses. Mail exploders are used to implement mailing lists. Users send messages to a single address and the mail exploder takes care of delivery to the individual mailboxes in the list. (1996-02-26)

  • Mail filter

    messaging A program which sorts and processes incoming mail based on patterns found in the mail headers. procmail is an example for Unix. (1996-12-09)

  • Mail-flag

    noun, Nautical. 1. a flag of the International Code of Signals symbolizing the letter Y, flown alone by a ship to indicate that it is carrying mail: a square flag with red and yellow diagonal stripes. 2. any of various other flags indicating that a ship is carrying mail.

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