nanog mailing list archives
Re: Localized mail servers, global scope
From: "william(at)elan.net" <william () elan net>
Date: Thu, 23 Jun 2005 06:07:22 -0700 (PDT)
On Thu, 23 Jun 2005 Michael.Dillon () btradianz com wrote:
You don't need a central MX if each site MTA knows which users are at which sites. Incoming email may have to take an extra hop if it comes in to the wrong site, but that's a consequence of the specification that no implementation can fix.In other words, SMTP does not have the equivalent of an HTTP redirect which is what he wants here. Maybe SMTP really is broken? ;-)
HTTP is 100% client-server protocol so redirect is server telling client to go somewhere else (which is exactly what HTTP redirect does).
But SMTP is store-forward system like ip itself. In store-forward redirection is changing of connection path by intermediate system.
So with ip this is handled by routers and transparent proxy servers. In SMTP this is handled by forwarding systems which change mail transmission connection and redirect and pass message somewhere else. So we do have redirect functionality SMTP, its just not done same way as HTTP because of differences in system infrastructure. P.S. Somewhat related work of mine: http://www.elan.net/~william/emailsecurity/draft-leibzon-emailredirection-traceheaders-01.html -- William Leibzon Elan Networks william () elan net
Current thread:
- Re: Localized mail servers, global scope, (continued)
- Re: Localized mail servers, global scope Tony Finch (Jun 22)
- Re: Localized mail servers, global scope Michael . Dillon (Jun 23)
- Re: Localized mail servers, global scope Peter Corlett (Jun 23)
- Re: Localized mail servers, global scope Michael . Dillon (Jun 23)
- Re: Localized mail servers, global scope Dave Crocker (Jun 23)
- Re: Localized mail servers, global scope Tony Finch (Jun 23)
- Message not available
- Re: Localized mail servers, global scope Dave Stewart (Jun 23)
- Re: Localized mail servers, global scope Dave Crocker (Jun 23)
- Re: Localized mail servers, global scope Tony Finch (Jun 23)
- Re: Localized mail servers, global scope Dave Crocker (Jun 23)
- Re: Localized mail servers, global scope william(at)elan.net (Jun 23)
- Re: Localized mail servers, global scope Suresh Ramasubramanian (Jun 23)
- Re: Localized mail servers, global scope Derek Diget (Jun 23)
- Re: Localized mail servers, global scope Brad Knowles (Jun 23)
- Re: Localized mail servers, global scope Michael . Dillon (Jun 24)
- Re: Localized mail servers, global scope Peter Dambier (Jun 24)
- Re: Localized mail servers, global scope Brad Knowles (Jun 24)
- Re: Localized mail servers, global scope Peter Dambier (Jun 24)
- Re: Localized mail servers, global scope Joe Abley (Jun 23)
- Re: Localized mail servers, global scope Matthew D. Fuller (Jun 24)
- RE: Localized mail servers, global scope Andrew Staples (Jun 22)