Bob I wrote:

What makes you believe you can remove it?

All newsreaders have a "Delete Post" function. (The wording may vary a
bit). It sends a command to your server, which your server is then
supposed to propagate just like nay other Usenet message. But not all
servers honor those messages. The msnews.microsoft.com server does not
honor them.

--
Tim Slattery

http://members.cox.net/slatteryt