Milter-greylist

Petar Bogdanovic <petar@...> writes:

> On Wed, Jul 14, 2010 at 12:56:05PM +0200, Oliver Fromme wrote:
>>
>> vanaxel79 wrote:
>> > dacl blacklist spamd > 15 msg "Message blocked for spam content"
>> > dacl greylist spamd > 10 delay 4h msg "Message greylist for spam content"
>> > dacl greylist spamd > 6 delay 2h msg "Message greylist for spam content"
>>
>> I don't have an answer for your problem, but I have a question
>> about your configuration. Why are you using the spam score to
>> select the greylist delay? I mean, an MTA that resends after
>> two hours will most probably also resend after four hours, so
>> it doesn't really make sense to differentiate between them.
>
> We're doing something similar. But you're right.. it probably does not
> make much sense and the best reason that I can come up with for such a
> config is `because we can'.

The overall challenge is to not delay legit mail and to block spam or at
least get it over 5 points.

So I'd write something like

dacl blacklist spamd > 10 msg "Message blocked for spam content"
dacl greylist spamd > 3 delay 6h msg "Message greylist for spam content"
dacl greylist spamd > 1 delay 2h msg "Message greylist for spam content"

to cause mail to be blocked long enough so that when it comes again it
will be more likely that addresses/etc. have made their way into RBLs.