henrys, your favourite post. Firefox is nothing to do with email!!
rugeleyboy: try using Thunderbird:
http://www.mozilla.com/en-US/thunderbird/
It contains a good spam filter, that is bayesian, meaning that it learns as it goes along. At first it might not be too great, but it should soon improve.
A major problem with your address though, if I read correctly, is that it's public-facing (it can be read from a website). This isn't a great idea, as spam bots can easily grab it. I don't know if you're able to do this, but getting an email form on your website, so that your address is not revealed, is a good idea.