Charged per DNS query? Really???!!!
That's seriously time to find a better ISP/host.
And you had better protect their identity. If their enemies or mischief
makers know, they are bound to pound the domain with DNS requests to run
up the bill.
Terry Fielder
terry(_at_)greatgulfhomes(_dot_)com
Associate Director Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
Fax: (416) 441-9085
Stuart D. Gathman wrote:
Here is an example of SPF adversely affecting a legitimate sender who
does not wish to participate (name changed to protect privacy):
$ host -t txt namechanged.org
;; connection timed out; no servers could be reached
Why don't they respond to TXT queries? They get charged by the query
response. Since they don't use TXT queries, why should they pay for
the DNS service to reply "we don't have any"?
But, when they try to send mail to SPF checking domains, the SPF result
is temperror - usually resulting in a 451 rejection.
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