On 2/8/2010 5:20 PM, John Levine wrote:
The DNS approach will tend to be somewhere between free and cheap for
mainstream uses.
I keep seeing this assertion, but it makes no sense. As a concrete
example, here's the DNS for the POP server for BT Internet, the largest
ISP in the UK. Can you describe the DNS changes needed if they were
publishing a spam button address?
R's,
John
$ dig mail.btinternet.com a
;; ANSWER SECTION:
mail.btinternet.com. 600 IN CNAME pop-smtp.bt.mail.yahoo.com.
pop-smtp.bt.mail.yahoo.com. 1800 IN CNAME
pop-smtp.bt.mail.fy5.b.yahoo.com.
pop-smtp.bt.mail.fy5.b.yahoo.com. 300 IN A 217.12.13.134
pop-smtp.bt.mail.fy5.b.yahoo.com. 300 IN A 217.146.188.192
I don't hack DNS records enought to be sure, but it appears to need exactly one
new record:
_report.pop-smtp.bt.mail.fy5.b.yahoo.com IN TXT
abuse-report(_at_)yahoo(_dot_)com
or perhaps I'm wrong and it needs a whopping 3 new records:
_report.pop-smtp.bt.mail.fy5.b.yahoo.com IN TXT
abuse-report(_at_)yahoo(_dot_)com
_report.pop-smtp.bt.mail.yahoo.com IN TXT abuse-report(_at_)yahoo(_dot_)com
_report.mail.btinternet.com IN TXT abuse-report(_at_)yahoo(_dot_)com
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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