AFAICT there is a very solid de-facto standard for both IP address
blacklists and mail domain blacklists, and this standard is
implemented interoperably by practially all DNS blacklists and MTAs.
What's the problem?
Would you care to describe what you see as the characteristics of
this de-facto standard? To what extent does the document at
<http://www.shaftek.org/publications/drafts/draft-irtf-asrg-bcp-blacklists-00.txt>
describe the de-facto standard?
Well, I'm not Tony Finch; I didn't write the double-quoted text. But I
think I understand it, and, based on that (possibly mis-)understanding,
here's my reaction to what you wrote:
* For an IP address BL with lookup domain foo.example-bl.org, to look
up IP address A.B.C.D, query for D.C.B.A.foo.example-bl.org.
* For a domain BL with lookup domain bar.example-bl.org, to look up the
domain quux.example.com, query for
quux.example.com.bar.example-bl.org.
Listings are indicated by A records (with 127.0.0.2 being perhaps the
commonest address returned, but by no means the only); TXT records
provide more detail, often suitable for direct use in an SMTP rejection
message.
Based on the table of contents of draft-irtf-asrg-bcp-blacklists-00 at
the URL you gave, it is orthogonal to this. This is an interface
standard and does not address blacklist policy at all; the draft you
point to describes policy rather than interface details. Indeed, the
introduction says "This note [...lists] guidelines for management of
public blacklists". Note "management"; how the list is managed is
orthogonal to how its query interface is defined.
Incidentally, note that the IP-address interface described above makes
no provision for IPv6. This will eventually have to change; we may
want to start thinking about those changes now.
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