postmaster n.

The email contact and maintenance person at a site connected to the Internet or UUCPNET. Often, but not always, the same as the admin. The Internet standard for electronic mail (RFC-822) requires each machine to have a `postmaster' address; usually it is aliased to this person.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

Post"mas`ter (?), n.

1.

One who has charge of a station for the accommodation of travelers; one who supplies post horses.

2.

One who has charge of a post office, and the distribution and forwarding of mails.

© Webster 1913.