On 02/02/2011 11:54 PM, Steve Jenkins wrote:
> On Wed, Feb 2, 2011 at 2:33 PM, Stan Hoeppner <s...@hardwarefreak.com> wrote:
>> In the mean time, maybe give this a go. 1600+ expressions matching rDNS
>> patterns of many millions of broadband IPs worldwide that shouldn't be
>> sending
>> direct SMTP. Catches quite a bit that PBL/CBL/SORBS-DYNA/etc don't and with
>> less delay, reduced load on dnsbl servers and your own network. Potential
>> FPs
>> will be SOHO and "Linux weenie" MTAs on consumer IPs. Usage instructions are
>> comments at the top of the file. Insert the restriction above/before any
>> greylisting daemons in main.cf, obviously. Some on this list and many on the
>> Dovecot list can testify to its effectiveness.
>>
>> http://www.hardwarefreak.com/fqrdns.pcre
> I can attest to the awesomeness of Stan's pcre file. I run it on all 5
> of our Postfix servers, and it catches a LOT of stuff. From my logs,
> what it seems to do best is block zombie mailers on dynamic IPs.
>
> And I updated to your latest version today, Stan. Thanks :)
>
> SteveJ
Its a good idea, but this would limit a user from using a server on his
residential ADSL from being an Email server, and force them to use their
ISPs relay. Else they might have to upgrade to a business package or
spend more money for a static IP address that they can amend the reverse
lookup record for. Pros and cons.
