Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!orion.oac.uci.edu!ucivax!gateway From: portal!cup.portal.com!Will@uunet.uu.NET Newsgroups: comp.protocols.iso.x400 Subject: Need Comparison Of X.400 And SMTP Message-ID: <9103201255.1.21150@cup.portal.com> Date: 21 Mar 91 01:38:17 GMT Lines: 10 Approved: usenet@ICS.UCI.EDU X-Origin: The Portal System (TM) x-attn: jns X-Previously-To: uunet!comp-protocols-iso-x400@uunet.UU.NET ReSent-From: Jerry Sweet ReSent-To: mhsnews@ICS.UCI.EDU 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? Can someone recommend a good article or book that compares the two transports in more detail? Thanks, Will Estes (apple!cup.portal.com!Will)