Exim Help

Hiya all,

Using exim v4.x and CentOS 4/5 on a bunch of servers at our company. We're having a tough time fighting spam relaying and such.

I basically want any tips and tricks for these, and one specific question.

How can I force ALL email that is sent from our box (no matter what form) to be authenticated to the same method as pop3 before it is sent ?

We have about 100 boxes or so, so you can help me make the world of spam less dominate by helping me with this.

I really do appreciate it.

Have a great day!