Re: [exim] Multiple domain query on DNS

On Fri, Dec 16, 2005 at 02:24:11PM -0500, Dave Lugo wrote:
> On Fri, 16 Dec 2005, John Stewart wrote:
> > didn't know (nor did I) if he is supposed to have reverse DNS entries
> > for each of his new domains as well.
> >
>
> As someone who herds mailservers that contain hundreds of domains,
> I'll say "don't worry about it".
Agreed.

> There is no requirement (or even sane expection) that the rDNS of
> a sending host match the MAIL FROM's domain.

To fill in what Dave is saying, the rDNS should match the name that the
mailserver uses to say HELO/EHLO. This means that your primary_hostname
must match the rDNS for the IP that you are using. I send mail out for
about 650 domains and all of them come out from the same IP and the rDNS
and forward DNS match to that IP. That's all you need worry about.

Hope that helps,

-John