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Re: RBL Usage questions
From: Noel Jones <njones_at_nospam>Date: Sun Apr 11 2010 - 01:16:11 GMT
To: postfix-users@postfix.org
On 4/10/2010 5:49 PM, Stan Hoeppner wrote:
> I reject most spam via other methods, mostly pcre/regex and cidr tables. My
> dnsbl queries reject less than 1% of my spam load. Plug the following
> dynamic/generic rdns regex table into your Postfix configuration and see if
> it catches some spam for you. It does a good job here. Given its size I'd
> recommend running it (and all your map files) via proxymap. Ask here if
> you're unsure or need help implementing proxymap. It bit me the first time
> I tried it.
>
> smtpd_recipient_restrictions =
> ...
> check_client_access regexp:/etc/postfix/fqrdns.regexp
> ...
You'll probably get more hits using
check_reverse_client_hostname_access. That prevents some
clients from sneaking through as "unknown" when they don't
have a matching A record.
http://www.postfix.org/postconf.5.html#check_reverse_client_hostname_access
-- Noel Jones
>
> /etc/postfix/fqrdns.regexp
> http://www.hardwarefreak.com/fqrdns.regexp
>
> This regex file is free for anyone to use if you wish to. The FP rate
> should be zero since it matches only dynamic/generic rdns names.
>