--- Bernard Dugas bernard.dugas@is-production.com wrote:
Sure, but at least, I know that no spamming is coming from my users and my outgoing smtp : small satisfaction for a small network :-)
what we did for a cable access network, is http://policyd.sourceforge.net/ configured for rate control. If a sender from a local dynamic IP pool sends more than 1000 emails in 15 minutes, its IP is automatically blocked for 24 hours, and the admins get a notifications. The admins were spending hours per week clearing the mailqueue and fighting the spambots, now they are no longer bothered.
In addition, the same policy daemon does greylisting on incoming email, and filters lots of incoming spam.
That's a great tool, but its internal design is a bit weak. I would gladly re-implement it if somebody would pay my time :)