SpamCheetah Realizing the potential of a technology is key to success. You also have to be quick at realizing the potential of humans...then only you can employ good people and grow. The insight you get in learning various technologies will help you in a big way
Watching a Spammer I've had a really stubborn (or really stupid) Russian spammer trying to post comment spam here most of the morning. He (or she) has made hundreds of attempts, a very few of which temporarily got by me until I adjusted my spam patterns to reject new drug terms I hadn't seen before.
Kerio Spam Control: Caller-ID and SPF Kerio Mailserver supports both Caller-ID and SPF. Not many other servers support these, but a few of the big people do, so it could be worthwhile to turn these on.