Remove An Archived Newsgroup Posting

If you don't want your Usenet postings saved by news groups archivers, you should use the x-no-archive command.

Once a posting has been saved, Google Groups archive will let you remove it from their database through a process they used to call called nuking, but only if the message was sent from the same email address as the one that you are trying to nuke it from.

No other known Usenet archive has a removal feature.