Milter-greylist

Quoting manu@...:

> Patrick Domack <patrickdk@...> wrote:
>
>> well, since we now have support for everything else (dnsbl, spf,
>> dkim), why not add p0f support (os fingerprinting) to selectively
>> greylist against.
>
> Heavily greylisting windows XP boxen could be a major benefit.
> How coudl that work? You would like to send probes to the sending SMTP
> server? It might be unreachable.
>
> Or do you plan to gather information from the SMTP connexion itself? How
> will you do that? Can you ask some local server about a given TCP
> connexion, given source and destination port and IP?

hmm, that was why I said 'P0f' support, p0f does all that without  
doing any probes.