mail filtering based on reverse DNS

[Fernando Gont]

On 08/09/2011 01:31 PM, Bjoern A. Zeeb wrote:
>> Anyway, if you reject mail from IPv6 addresses without reverse DNS
>> today, then you are guaranteed to reject legitimate mail.  One might
>> even question the usefulness of reverse IPv6 DNS as a low score spam
>> rule.  There are just too many matching legitimate sources.
> 
> If one operates a legitimate mail server and is unable to provide any reverse
> mapping for the v6 address I seriously do not care to not accept his email as
> it's clearly not operated in a professional manner.

It's unclear to me how you can so easily deem people as unprofessional
(for a simple error), but then show no concerns when an OS sits on a
security vulnerability without a fix for a year and a half.

Should *I* start trolling now?

Thanks,
-- 
Fernando Gont
e-mail: fernando at gont.com.ar || fgont at acm.org
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1