Author: Exim Mailing List Date: To: exim-users Subject: Re: [exim] Default enabling of dnsdb
On Wed, May 06, 2009 at 04:41:55AM +0800, W B Hacker wrote:
> There may well be cute and clever things that only DNSDB enables.
>
> But DNSDB is *not* needed to test for a PTR RR.
Checking for the presence of a PTR record, and looking for valid reverse
DNS are not the same things.
The reverse_host_lookup functions in Exim will fail if the
forward-check also fails.
If you only want to check for the presence of a PTR record, and do not
care about the forward-check, I haven't been able to find any way to do it
without using dnsdb.
