On Mon, 25 Jun 2007, Marc Perkel wrote:
Clarification. When I say that spammers can't spoof RNDS what I mean is that
if you do a reverse lookup and get a spoofed name then when you look up the
spoofed name it won't resolve back to the IP you looked up. I'm testing this
idea now.
RoadRunner Internet is already doing this. A customer of ours received a
rejection message and this was within the content:
452 Too many recipients received this hour. Please see our rate limit policy
at http://security.rr.com/spam.htm#ratelimit
I can't to it myself here. I had it set once and by the end of a day, I
had received a number of complaints from customers that they were not
receiving messages from who they were before.
Here I use Postfix and it is just a matter of "throwing a switch"
so-to-speak to enable this feature.
