Re: Greylisting Effectiveness

We are getting away from the original thought of this thread...

I get 1 spam per day, maybe.  So I have no interest in using an 
outside blacklist checker.  In my case it would merely be adding to 
background internet traffic clutter unnecessarily.

Here is a line from my maillog:

DENIED_RDNS_MISSING from: cdiua@... to: 
wcfgynhh90187@... origin_ip: 27.41.147.251 origin_rdns: 
(unknown) auth: (unknown) encryption: (none) reason: (empty)

I have SCADS of lines like this (I have no idea who the to: or from: 
folks are - I only host one domain on my box).  In my mind, this 
implies that the RDNS_MISSING function of spamdyke is keeping the 
OVERWHELMING majority of the spam out of my box.

Am I misinterpreting this?

On 7/12/2012 11:00 AM, spamdyke-users-request@... wrote:
> I use:
> dns-blacklist-entry=zen.spamhaus.org
> dns-blacklist-entry=bl.spamcop.net
>
> It's very rare that these give a false positive. I would try them to see
> how they perform for you.