invalid regexp

Ok, I am on some lists which send their mail directly to each user, rather
than having some useful "To" line which I could match.

I also want to not match majordomo stuff

If any of these are true, then don't match

* ! ^(Sender: nextppp(_at_)chinx1(_dot_)ThoughtPort(_dot_)COM|\
        From: Majordomo|\
        From Majordomo|\
        X-Mailing-List:|\
        BestServHost: lists.best.com|\
        X-Loop: TopTen(_at_)pobox(_dot_)com)

Would it be better to do this:

* ! ^Sender: nextppp(_at_)chinx1(_dot_)ThoughtPost(_dot_)COM
* ! ^(From|From:) Majordomo
* ! ^X-Mailing-List:
* ! ^BestServHost: lists.best.com
* ! ^X-Loop: TopTen(_at_)pobox(_dot_)com

?

Thanks

TjL