John Levine wrote:
Could someone explain why a DNSBL needs to return IPV6 addresses?
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?
A and TXT records were the way found, years ago, to implement DNSBL
without creating new kind of DNS records.
In fact, as long as I understand, the A record is useful to return a
machine handleable code allowing to specify, why the record is listed.
The TXT record contains human readable information.
As long as IP address is the usual result of an A query, an IPv4 address
is the result usually returned by DNSBLs.
If something should be done about that, it's only to improve coding, not
to add another redundant type of result.
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