RE: Performance Issues - PTR Records

[Leo Vegoda <leo.vegoda () icann org>]

Mark Andrew wrote:

[...]

> > That said though the PTR->forward->PTR check is a proper check and a
> > really great way to figure out if the source SMTP host was actually set
> > up with at least some admin doing it the right way. If they can't be
> > bothered to set that up, why should you bother to accept that mail, or a
> > better choice, just score it a bit negatively at least.
>
> Which only works as a filter because ISP's decided to prevent home
> users from putting valid PTR records in the DNS for their own
> machines.  It has nothing to do with clue or knowlege.  

Some do but some don't. I seem to remember a very nice little web interface for setting reverse DNS when I used 
xs4all's service in the Netherlands. 

Regards,

Leo