----- Original Message ----
> From: Jose-Marcio Martins da Cruz <jose-marcio.mart...@ensmp.fr>
> To: Stan Hoeppner <s...@hardwarefreak.com>
> Cc: postfix-users@postfix.org
> Sent: Sun, January 17, 2010 9:36:59 PM
> Subject: Re: How to not reject valid MTAs for inconsistent forward/reverse
> DNS.
>
> Stan Hoeppner wrote:
>
> > Rejecting mail due to lack of a PTR is an anti bot spam tactic. It is as
> > prevalent today as it was 5 years ago, but probably less effective. Many
> > ISPs
> > went PTR crazy, assigning them to all their dynamic consumer IP ranges.
> > DULs
> > and generic PTR regexes are now more effective in this regard. Even so,
> > there
> > are still large amounts of consumer IP space without PTRs, so this tactic is
> > still valid, and still widely used.
>
> The problem is that in countries under developpement (e.g. in Africa), there
> are
> lots of legitimate mail servers who aren't well administered (accordingly
> with
> our "best practices"). So rejecting messages coming from servers without PTR
> is
> a way to reject communications with these countries. It's okay if don't
> communicate with people from these countries.
>
> JM
JM,
There are various online tutorials that describe how to setup a proper name
server, and how to administer one. If they are unable to teach themselves,
then they should get rejected till they become better educated in the practices
of Information Technology and System Administration. Most of those countries
you speak of setup e-mail for only one thing, and that is to propagate spam out
to the world. Ever received email from a prince stating they will give you 50
Million USD if you send him 10K? If yes, then you know what I am talking about.
Daniel Reinhardt
Website: www.cryptodan.com
Email: crypto...@yahoo.com
Junior Network Security Engineer
