On 5/17/05 12:53 PM, "Jaye Mathisen" <[EMAIL PROTECTED]> wrote:

> I've been reading on greylisting, and thinking about integrating
> it.  
> 
> However, one question sticks in my head, if you authenticate  auser via
> some SMTP-AUTH method, then is grey-listing bypassed?
Not an issue here, as the Exim instances that customers talk to are separate
from the MX that the world talks to.

> 
> I was also thinking about going to really short intervals.  Like 5 minutes.

We use a Python daemon we wrote here (which tracks using a MySQL database).
Exim gets a simple ACCEPT or DEFER back from the daemon, and acts
accordingly.  (Mostly at RCTP TO: time, but we defer the <> sender and some
others to DATA time for greylisting (to avoid issues with those doing
callbacks), and we have whitelisting in a database with fairly fine-grained
control (not quite fine enough, unfortunately)).

Keeps a lot of messages out of our system (including the new Sober), and the
drivel that the machines infected with the new Sober are now spewing out.

A process runs every 5 minutes to clean up the database.

The separate daemon is much easier than trying to make Exim make the
decisions.

  --John



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