I have a client who has an old IBM server that can't select to have the outbound server check authentication so I put his IP in the privledged list. Things worked fine for a few weeks, although there were frequent delayed emails that took two or three times to deliver. Then, about two days ago, most emails from that particular server stopped going through altogether and I noticed that mails that did go through had the "From" and "Date" headers stripped. Any ideas? I've tried several basic things to no avail. Any help would be greatly appreciated. Thanks!