On Aug 4, 2008, at 3:56 PM, Douglas Otis wrote:
I don't know anyone who thinks that a DNSBL should return anything
other than A and TXT records. What leads you to believe otherwise?
Agreed. Keep answers to A and TXT records. Just different names
are being questioned. A records provide 4095 different values which
seems more that adequate. Internally, we are using 16 bits filtered
against customer preferences. When memory becomes limited, TXT
records seem the first items dropped from the answer.
Sorry, this was just considering our internal use. We expose some
bits to customers, and others are masked for internal sub-categories.
The overall range of an A record, where the upper octet is 127 and the
value 127.0.0.1 is avoided, would be 16,777,214. Many customers base
acceptance on whether no answer and no error is returned, and then
never examine the content of the A record.
-Doug
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