Once upon a time, spam was something delivered in a can. Nowadays, it comes in all flavors directly delivered to your mailbox. Get a bigger/longer penis, buy cheap meds, get a university diploma etc. And lets not forget all the nice letters from Nigeria. I read somewhere that spam already constitutes over 50% of all email traffic on the internet. That’s just wrong. On my own mailserver I’ve used SpamAssassin since day 1. It’s a really nice server-side filter for guessing which emails are spam and tagging them accordingly. It’s then up to your email client or some other filter to do whatever’s appropriate. However, this still requires your email server to do alot of processing. Enter a “new” technique for stopping spam at the door – Greylisting!

» Read more: Spam & Greylisting