Nope, the Message-ID is the one field that is guaranteed to be unique
for each message on Usenet. There can be only one article with a
certain Message-ID. The Path header is modified by each server which
gets the article, and the Xref: header is inserted locally by the
server, so you can keep track of articles crossposted to other groups
by article number.
--
E-mail: galactus@stack.nl | PGP encrypt if you can (Key ID 0x416A1A35)
http://www.stack.nl/~galactus/ | To find out more about PGP, send mail
| with HELP PGP in the SUBJECT line to me.