nanog mailing list archives
RE: Performance Issues - PTR Records
From: Leo Vegoda <leo.vegoda () icann org>
Date: Wed, 9 Nov 2011 11:08:44 -0800
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
Current thread:
- Re: Performance Issues - PTR Records, (continued)
- Re: Performance Issues - PTR Records sthaug (Nov 07)
- Re: Performance Issues - PTR Records Leigh Porter (Nov 07)
- Re: Performance Issues - PTR Records Bjørn Mork (Nov 07)
- Re: Performance Issues - PTR Records Leigh Porter (Nov 07)
- Re: Performance Issues - PTR Records Seth Mos (Nov 08)
- Re: Performance Issues - PTR Records Mark Andrews (Nov 08)
- Re: Performance Issues - PTR Records bmanning (Nov 08)
- Re: Performance Issues - PTR Records Jeroen Massar (Nov 08)
- Re: Performance Issues - PTR Records Mark Andrews (Nov 08)
- Re: Performance Issues - PTR Records Jeroen Massar (Nov 08)
- RE: Performance Issues - PTR Records Leo Vegoda (Nov 09)
- Re: Performance Issues - PTR Records Mark Andrews (Nov 09)
- Re: Performance Issues - PTR Records Jimmy Hess (Nov 04)
- Re: Performance Issues - PTR Records Jay Ashworth (Nov 04)
- Re: Performance Issues - PTR Records Blake Hudson (Nov 09)
- Re: Performance Issues - PTR Records Matthew Palmer (Nov 02)
- RE: Performance Issues - PTR Records Barry Shein (Nov 02)
- Re: Performance Issues - PTR Records Jimmy Hess (Nov 02)