It should be noted, that some news servers have extensiveStan said:Perhaps the relevant question is not "how do I?" but "should I?"
People tend to crosspost because it's easy, but very seldom are two
newsgroups equally relevant to a given issue.
cross-posting filtering. And your submission will be judged
by that filtering.
The more picky servers, may stop crossposts at three or four groups.
And if a soc.* group is included, stop the crosspost entirely
(as a study showed virtually all the inflammatory posts were
being crossposted, and it was an instant fix for abuse - it made
a dent in the traffic).
So if a cross-posted message is rejected, there are reasons.
The administrators have seen it all - and built filters for it.