Sacha wrote:
Can anyone tell me how to X-no archive posts, please? I use a Mac
System X but I suppose it might not be possible at all!

http://groups.google.com/googlegroups/help.html#prevent

I do not want you to archive my article(s)! How can I prevent messages that
I post from being archived on Google Groups?
Google supports the 'X-No-archive: yes' header, and we will not archive any
articles that contain this text either in the header or in the first line of
the message body.



pk