We run nearly all lists here with X-Tags= Yes. One subscriber (out of 400+) from one of these lists is occasionally getting duplicate postings. The claim is that X-Tags= Yes is possibly the problem. I have no idea if this is true or not, but I am doubtful. My questions are: Has anyone else seen a duplicate posting problem that was solved solely by changing X-Tags? If not, how would you trace this problem from this Listserv site to that end site? Personal mail sent to the remote user arrives there in single copy...