How does one exclude a host from having its address modified with a .bitnet? An internal host (mailserver) does NOT show my newly build solaris-listerv box its fully qualified domain name. This will not change per infosec folks. so listserv gets a post from usr1@mail1, not [log in to unmask] , and merrily tacks on a .BITNET. How do I prevent this behavior for this one internal mail-host?