Tip: If you want your reply to go to additional newsgroups on the same news server, click the icon next to Newsgroups in the Reply dialog box. In the Pick Newsgroups dialog box, select a newsgroup from the list, and then click Add. You can choose from all newsgroups or only those you subscribe to by clicking the Show only subscribed newsgroups button.
You can send your reply to more than one newsgroup at a time only if all the newsgroups are on the same news server.