On Sat, 8 Mar 2014 09:50:16 -0600, "R. C. White" wrote:

Don't send your message individually to multiple newsgroups. Just create a
single message and put multiple newsgroups, separated by semicolons, into
the "Newsgroups..." box of that one message.

I'm not aware that semicolons will work to separate newsgroup names. The
plain old comma is recommended, with no spaces before or after.