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
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