In Exchange 5.5 (NOT an AD member) I was able to set the FQDN to = our external e-mail domain name, therefore the mail headers the receiving party saw were "mailserver.externaldomain.com" On my new Exchange 2000 machine, even WITH the Masquerade domain set to "externalmaildomain.com" the receiving party's header now says "mailserver.localADdomain.local" How can I "Hide" the internal AD domain name? I'm using the Front-End / Back-End scenario, which intensifies this problem by either the Back-end server shooting straight out revealing it's internal name & the AD name, or if I set the Front-End server as the 'Smart host' (this doesn't re-write the header), revealing BOTH internal mail server names, the AD name & the internal IP addresses?? It's all a bit to 'revealing' if you ask me. How is everyone else handling this? Thanks for your time, Kevin Kevin A. Henry Senior Systems/Network Administrator Specialists in Intellectual Property Law Wolf, Greenfield & Sacks, P.C. 600 Atlantic Avenue Boston, Massachusetts 02210-2206 617.720.3500 www.wolfgreenfield.com This e-mail message and any attachments may contain confidential or privileged information. If you are not the intended recipient, please notify me immediately by replying to this message. Please destroy all copies of this message and any attachments. Thank you.