Milter-greylist

On Wed, 7 Oct 2009, Jonas Israelsson wrote:

> +1
>
> grep "Greylisting in action" mail | wc -l
>  746855
> grep "autowhitelisted for" mail | wc -l
>    7361

There is extreme benefit here as well:

% grep "Greylisting in action" syslog* |wc -l
315079
% grep "autowhitelisted for" syslog* |wc -l
5300

My email address has been plastered on thousands of web pages and 
documents on the Internet since 1993.  Due to this, sometimes 1000 
spams per day were getting through my baysian mail filter (which I 
still also use).  Now that I am using greylisting, sanity has 
been restored, although it causes inconvenience at times.

There are ways that a system administrator could accidentally botch 
greylisting.  For example, mail delivery could be allowed on some 
other friendly host (via a MX record) when then repeatedly tries to 
deliver the message until it succeeds.  All MX mail hosts need to 
engage in the greylisting or it won't work.

Bob
--
Bob Friesenhahn
bfriesen@..., http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/