ISP in the UK. Can you describe the DNS changes needed if they were
publishing a spam button address?
$ 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
Nope, that won't work. CNAMEs don't do a partial match.
_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
That won't work, either. You can't have DNS records below a CNAME.
By the way, I was wrong about SRV records. This DNS hack just doesn't
work, but it won't work much more elegantly with RP records. See RFC
1183.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
"I dropped the toothpaste", said Tom, crestfallenly.
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