Many years back I began investigating anti email spam in the UK as a way to defend against the amount amount of email spam we were receiving to certain email addresses.
The reason this email address was getting so much spam is because it was harvested by a website spider bot, as the email address was placed on company website by the previous webmaster.
DO NOT put your email address or any email addresses directly on your website, instead use a form.
Back then there was only examples of support for US, but very little support in the UK.
One thing I did find was the Office Of Fair Trading Spam Tips but they were not very useful, the JunkBusters.com website has some nice tips on “junk email“, if only something existed like this for the UK.
I discovered that in the US you can send your junk/spam email to [email protected] and they will pursue law enforcement actions against people sending the emails.
Update: In 2010 the BBC offered an article entitled: “How can I stop getting spam emails?” which seems to offer sufficient advice, there’s also a whole heap of resources in the Dmoz “email spam” directory.