High Quality Content by WIKIPEDIA articles! X-No-Archive, also known colloquially as xna, is a newsgroup message header field used to prevent a Usenet message from being archived in various servers. The need for X-No-Archive began when DejaNews debuted in 1995. DejaNews was the first large-scale commercial attempt to archive the Usenet news feed, and several newsgroup participants were concerned about privacy rights and about the possibility that their messages could be re-posted through DejaNews in the future. DejaNews addressed these concerns by announcing that it would not archive Usenet messages containing the X-No-Archive header field. X-No-Archive was designed to follow the standard message header protocol, RFC 1036 and 977, used in existing newsgroups. In addition to the standard header fields used in all newsgroup messages, news reader software allows a user to add optional fields to a header.