Author: Tim Jackson Date: To: exim-users Subject: Re: [exim] using MX always
On Sun, January 8, 2006 4:55 am, Jeff Lasman said:
> We set up the DNS before we send the email. The problem is we can't use
> MX delivery or we'll have email loops. And also we have no idea when
> the client will change their nameservers; that's not under our control.
I know thie situation you're talking about.
The simple solution is to split your authoritative and caching
nameservers, so that only *external* hosts see your authoritative
nameservers (with the new DNS records) whilst all your internal hosts and
processes use a caching nameserver that does not know anything special
about domains for which you are authoritative.
Even on a single machine, you can do this by running two copies of BIND.
BIND experts might be able to tell you how to do it with a single
instance; I've never really looked into it.
