On Thu, 03 Feb 2011 10:44:13 +0100 J4K <ju...@klunky.co.uk> wrote: > 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. >
No cons that I can see.
