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Also known as: Expires
A header suggesting a date after which an article may be removed. Servers treat it as advisory: most apply their own retention policy and ignore the request, though some honor it so that short-lived announcements do not linger. Setting a distant Expires date does not extend an article's life on a server whose own expiry runs shorter, which is the usual source of confusion about it.
Browse all terms in Core Usenet Concepts, or see the full Usenet glossary.