On Sun, May 24, 2009 at 07:34:09PM +0200, Thomas Klaver wrote:
> Is it possible to retrieve the highest prioritized MX record using a
> dnsdb lookup? If so, how?
> How would dnsdb affect a server's load? We're talking about a fallback
> platform for approximately 500+ domains - and growing.
How are you planning to use dnsdb? Hopefully not by accepting mail for any
domain whose MXs include your server name... besides, @mx_any does that, but
it's still unwise to use that as the sole means of controlling which domains
can use your server.
> Are results of a dnsdb lookup cached? If that may be the case, for how
> long are they cached?
Forgive me for not answering your question, but... get yourself a caching DNS
resolver on localhost, and make sure it respects the DNS TTLs.
--
Dave Evans
http://djce.org.uk/
http://djce.org.uk/pgpkey
