Re: [Dovecot] what best for anti-spam filter?

On Tue, Jul 24, 2012 at 03:38:00AM -0500, Stan Hoeppner wrote:

Greylisting only stops bots. It is resource intensive, and causes delivery delays. There exist bot spam killing solutions that are just as effective, with less downside. Two are Postfix' postscreen daemon, and fqrdns.pcre, which rejects based on consumer/dynamic looking rDNS.

I use that in order to decide the greylisting delay: suspect IP get a 12 hours greylist, everyone else gets 15 mn, or 0 if whitelisted by recipeients. It works quite well.

-- Emmanuel Dreyfus manu@netbsd.org