Informative technical articles

If you are interested in further technical information in connection to news, you should not miss the following URLs.

Header entries: http://www.kirchwitz.de/~amk/dni/headerzeilen (German)
A very useful message-ID FAQ: http://www.hanau.net/usenet/faq/messageid.php (German)
A lot of links about newsreaders and related topics: http://www.leafnode.org/links.shtml
RFCs, Drafts and documents for the technical interested: http://tools.ietf.org/wg/usefor/