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Also known as: expiry, expire
The removal of articles once they pass a server's retention window or the spool runs out of room. Policies are set per hierarchy, so text groups may be kept for years while binaries roll off on a fixed schedule. Expiry explains why a release that downloaded cleanly a year ago now returns 430 errors on every segment: those articles are gone, not merely misfiled.
Browse all terms in Core Usenet Concepts, or see the full Usenet glossary.