dead letter box


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dead letter box

[¦ded ′led·ər ‚bäks]
(communications)
A file for storing undeliverable messages in a data communications system, particularly a message switching system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
There are even electronic dead letter boxes. Four years ago the FSB accused British spies of concealing hi-tech devices inside hollowed out rocks.