DNS Query Question

David Ulevitch davidu at everydns.net
Thu Jan 18 19:12:12 UTC 2007

Dennis Dayman wrote:
> I have a customer having some DNS issues. They have done some research
> regarding some DNS timeout errors they saw with Verizon's sender verify
> looking up their MX records. What they have discovered is their current 
> DNS service has a 1% failure/timeout rate. They are exploring other 
> vendors (UltraDNS for one), but need an estimate of the number of DNS 
> queries for accurate pricing to put together a ROI argument for the
> switch.
> I have no IDEA if this can be determined, but what is a good estimate of
> the number of DNS queries generated from sending an email? 

That's not a good tack to take to figure out the answer.

Just check the logs of your current DNS server and count 'em up.

UltraDNS isn't cheap.  But neither is downtime, I suppose.


More information about the NANOG mailing list