Re: [exim] Recipients with no MX record need to drop

On 2008-11-11 at 18:33 -0500, Don Sceifers wrote:
> We realize that. We own the server & control all of the domains on it. We
> have some wildcard DNS entries (A Record) that we serve up related search
> pages on. The problem is there is no MX record for the wildcarded domains.
> In fact, we are trying to break delivery to sites with an A, but no MX
> record. We are trying to drop the 100-150000 emails that go nowhere every
> day. Exim is crushing that box because of this traffic.
> The problem with the mx_domains is the need to continually update it as we
> add more domains to the box that might operate this same way. It is easier
> for us to maintain the DNS entries properly.
>
> Does anyone know how we can set the ACL to drop anything that doesn't have
> the MX record?

mx_domains = *

Your original mail only pointed to one or two parent domains, in which
case a wildcard of everything under those parents, as suggested, would
work.

-Phil