mail server mail hub 1. <tool, messaging> A program that distributes files or information in response to requests sent via {electronic mail}. Examples on the {Internet} include {Almanac} and {netlib}. Mail servers are also used on {Bitnet}. In the days before {Internet} access was widespread and {UUCP} mail links were common, mail servers could be used to provide remote services which might now be provided via {FTP} or {WWW}. 2. <messaging> (Or "mail hub") A computer used to store and/or forward {electronic mail}. (1995-05-05)