On 03/13/2015 07:54 PM, John Hardin wrote:
On Fri, 13 Mar 2015, David B Funk wrote:Except that the rrpproxy.net people have figured out a way to cirumvent this. They now register spammer domains and don't list -any- NS records in the zone.Is *that* a useful spam sign? Remember, SA is not an RFC compliance validation tool. If a few legit admins do that, and lots of spammers do it, then it's useful for detecting spam.
Even if it's very tempting, it's not safe to use. (been there - got bitten)
