Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!portal!cup.portal.com!Will From: Will@cup.portal.com (Will E Estes) Newsgroups: comp.protocols.tcp-ip Subject: Need Comparison Of X.400 And SMTP Message-ID: <40390@cup.portal.com> Date: 20 Mar 91 20:54:42 GMT Organization: The Portal System (TM) Lines: 9 Can someone tell me what are the key features present in X.400 addressing that are missing from SMTP-style addresses? As I understand it, X.400 is a superset of existing mail systems that tries to capture enough information in the mail address to make it unique on a global network. Specifically, what does it do in this respect that SMTP cannot do, and what are some of the other advantages of X.400? Thanks, Will Estes (apple!cup.portal.com!Will)