Are the emails all responses to threads you've replied to? In that case, you can turn off all existing subscriptions on your subscription list
; just click the box at the top of the list to select all, and then down at the bottom of the list, where it says "Move to folder...", you can delete the subscriptions or change them to "No email notification".
Then, under your Profile Options
, look for "Default Thread Subscription Mode" and change it to no email, too, so you don't get email notifications for new threads to which you reply.