Hi Simon,
you are automatically subscribing to threads. There is a User Option to turn this on, and yours was on. I have turned it off. You were subscribed to 117 threads, thus when anything got posted to those threads you got an email about it. Linkbacks are like posts you cannot see.
I have fixed that for you but had to reset your password in the process. I turned the feature off, you can turn it back on, but don't be suprised if you get a lot of emails.
Ron