I'm not sure this solution works with the original person's requirements. It sounds like with your solution you need access to systems that the other person doesn't have access to: "setup a connection to the mail server from the spamd machine using nc"
On Tue, Apr 27, 2010 at 8:50 AM, Girish Venkatachalam < [email protected]> wrote: > On Tue, Apr 27, 2010 at 4:31 PM, <[email protected]> wrote: > > Hi, > > > > I have a client, he receives a lot of spam from his ISP Mailserver. > > Is there a way to limit spam using an OpenBSD Gateway with PF and Spamd > at > > his place ? (His mailserver is ISP Mailserver, so he hasn't mailserver) > > > > I think it is not possible, true ? > > If you have an idea ... > > I have a totally different perspective and answer due to my experience > fighting spam. > > In fact I get close to 40 GB downloads for my open source spam product > based on spamd. > > It does a great job of spam control or else why would people download? ;) > > Even in my customer locations in Chennai where they run my appliance > they get only 5 spam messages > in a year. But you should understand that the incidence of spam in > India is much lower than America. > > Anyway read up this page: > > http://spam-cheetah.com/install.html > > to understand what you can achieve with pf(4) and spamd for spam > control and how you ensure that the > TCP rdr is completed in the reverse direction also. You need to > configure the mail server's gateway as > spamd. > > This is only necessary when you run spamd and do rdr(a reverse of NAT) . > > Whereas if you act as a TCP proxy in which you setup a connection to > the mail server from the spamd > machine using nc or some similar thing(you could configure using > inetd(8)) then your mail server > can be anywhere. > > I have never tried that config and I can bet that rdr is way more > efficient... > > Sorry I can't do more justice to this topic as I am running out of time. > > Later. > > Ever yours, > Girish > > > -- > Gayatri Hitech > web: http://gayatri-hitech.com > > SpamCheetah Spam filter: > http://spam-cheetah.com > > -- Dethink to survive - Mclusky
