It's always a good day when one step further is taken to combat spam. This is when browsing the BBC's website I came across the following article - Backing for tool to battle spam
Lets hope that ISPs and Companies can offer a common element like this so that we can prevent these unwelcomed emails.
In many cases it's due to insecure mail servers that have "relay email" enabled, virus/trojan infection, spammers using applications that has it's own email engine or even abusing there own ISP's email server.
Not a day goes by without my old freeserve account being spammed. 60ish emails...