Re: Variation on the greylisting idea

[Gustavo Franco <stratus debian org>]

Vincent Untz wrote:
> Hi,
>
> I just read the mailing list archives and saw that greylisting was
> proposed a few weeks ago, but some people don't like it (which is
> understandable).
>
> Another approach could be to greylist only mails coming from domains
> in a rbl database. This makes it possible to use greylisting for the
> most probable spam sources.
>
> Whitelister is a project that does exactly this (page is in French):
>   https://projects.aaege.net/mailtools/wiki/Project.Whitelister
> README:
>   https://projects.aaege.net/mailtools/file/trunk/whitelister/README
>
> I'm not sure if it'd be easy to get this on the servers though (you
> need ocaml to compile it).

If you don't want to compile ocaml code and if there's no similar in C, C++
or Python in the postfix add-on page[0], and i guess not. I can extend my own
policy server (in Python) to do whitelist RBL-based check if you need, since
it's a cool feature i'll code it anyway.

The tool is called postcontrol, it does spf and greylist but i still need
to put it online somewhere. It's working for a year in four medium sized
mailservers without any problem.

[0] = http://www.postfix.org/addon.html

--
Gustavo Franco - <stratus debian org>