"David (Normandy)" writes
can anyone advise on whether Outlook Express can be set to dump all posts
that are addressed to other newsgroups.


Don't think so. I've looked at all the features in OE and there is nothing
suitable.
I'm thinking of changing to another email reader such as Forte Agent.
It looks like it has features to automatically delete all the cross-posted
rubbish.
Anyone know if this is any good or can recommend another newsreader from
experience?

Turnpike can also delete all cross posts (or, eg, articles cross posted
to more then 2, 3, etc groups - useful if you want to block spam but not
articles that have been crossposted to eg ponds). It's got menu items to
kill authors, subjects, threads, and then a good facility to create your
own rules for deleting almost any combination you care to think of.
--
Kay