This article is from the rec.music.reviews FAQ, by Al Crawford (email@example.com) with numerous contributions by others.
You can post a review in the regular fashion from within your
newsreader. It will automatically be mailed to the moderator, who will
check it, probably approve it and then post it to the newsgroup. If
you're having trouble doing this, you can mail the article directly to
firstname.lastname@example.org where it will be posted in due course. I have no
problems in principle with crossposting articles to other newsgroups,
such as rec.music.industrial, rec.music.country or
alt.music.alternative. In fact I'd positively encourage posters to do
this rather than post several copies of their review if it's relevant
to several different groups, but I'd appreciate the addition of a
reminder somewhere in your posting if one of the groups you want your
review crossposted to is also moderated - I wouldn't want to step on
another moderator's toes.