Date: Wed, 1 Jun 2005 13:33:25 -0400 From: Bill Moran <wmoran@potentialtech.com> To: Bart Silverstrim <bsilver@chrononomicon.com> Cc: freebsd-questions@freebsd.org Subject: Re: postgrey question Message-ID: <20050601133325.6f5a11ac.wmoran@potentialtech.com> In-Reply-To: <aad084e1944e0f96ddea764fe90f20fc@chrononomicon.com> References: <0a6397740f09ea4ac7cce0b1bead3bde@chrononomicon.com> <20050601102246.3f199feb.wmoran@potentialtech.com> <aad084e1944e0f96ddea764fe90f20fc@chrononomicon.com>
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Bart Silverstrim <bsilver@chrononomicon.com> wrote: > > On Jun 1, 2005, at 10:22 AM, Bill Moran wrote: > > > Bart Silverstrim <bsilver@chrononomicon.com> wrote: > > > >> I've been looking into ways of improving our spam filtering. > >> Currently > >> I'm running postfix with amavisd-new (spamassassin and clamav), and > >> saw > >> an article on greylisting using postgrey. Turns out there's a port > >> for > >> it already in FreeBSD. > >> > >> I am still googling for info, but as I understand it the policy will > >> inject the message to another queue for postgrey to evaluate? If this > >> is true, what happens if I install it while still running the > >> postfix/amavis solution, which is also a double-queue system for > >> evaluation of messages? Will doing a make install for postgrey damage > >> the installation we currently have in place and working? > >> > >> Anyone else running postgrey with amavis on postfix, on FreeBSD? I'd > >> appreciate any feedback/experiences people have to offer. > > > > Yes, I'm running Postgrey with Amavis on FreeBSD. Works great. > > > > The short answer is that Postgrey plays nice with Amavis. > > > > The medium-length answer is that Postgrey simply becomes another check > > that is run. Postfix has a "policy service" hook that allows Postfix > > to consult with an outside program prior to accepting mail. This is > > a different process than the multi-queue system that Amavis uses, and > > the two co-exist nicely. Postgrey works more like the rbl checks than > > the multi-queue system that Amavis uses. > > > > The long answer is contained in the technical details of Postfix, and > > the Postfix source code, and I won't attempt to duplicate that here ;) > > Are there instructions you know of for the installation to get postgrey > to integrate with postfix from ports on FreeBSD? (Huh?) > > Um...let's rephrase. Is there a reference of what needs to be done > after running "make install" in the postgrey port directory to get > postfix to see it and use it, preferably without killing the working > amavisd? You'll need to put the following in /etc/rc.conf: postgrey_enable="YES" as specified by the port, and enter a line like: check_policy_service 172.0.0.1:10023 in /usr/local/etc/postfix/main.cf (please check the Postgrey docs, I'm pulling this from memory and I'm not 100% sure it's exactly right). -- Bill Moran Potential Technologies http://www.potentialtech.com
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