Re: Localized mail servers, global scope

[Andre Oppermann <nanog-list () nrg4u com>]

Valdis.Kletnieks () vt edu wrote:
> On Wed, 22 Jun 2005 17:23:22 BST, Tony Finch said:
>
> > You need a table of name -> location mappings which each mail server can
> > use to route email. You could distribute the table using whatever
> > technology you like, e.g. LDAP. Google for Schlumberger Exim LDAP for a
> > complicated example, though it can be done much more simply.
>
> That's all fine and good once the mail gets into his e-mail infrastructure.
>
> The problem he's going to hit is that he wants *my* mail server to send mail to
> 'fred () example com' to get routed to the MX in San Fran where Fred is, and *my*
> mail server to send mail 'johann () example com' to get routed to the MX in Geneva
> where Johann is, and avoid having a central MX that then does routing.
>
> And basically, he's screwed, because the MX lookup is only based on the RHS
> of the target address.  AT *best* he can deploy a @NN.example.com and have
> different MX entries for US.example.com and FR.example.com and so on (but he
> already said that's a suboptimal).

He needs something like the distributed clustering of qmail-ldap.  Any mail-
cluster member can accept messages for all others and does direct internal
redistribution without going through HQ.  No country specific subdomains needed.
Everything has user () example com.

--
Andre