First, remove any threads which you don't want notifications for on this page: https://www.cointalk.com/watched/threads/all Then, go to your preferences (you can get there by clicking your name in the top right), and un-click the "Automatically Watch Threads" box. Or, if you just don't want the site to email you at all, just go in the privacy page and unclick the "Receive Site Mailings" https://www.cointalk.com/account/privacy It might take up to 24 hours or so for all the emails to flush out of the system.
I hear from you seldom enough that its always a pleasant reminder that there is a great forum I can visit. When you make a general inquiry such as today's email about connection issues you should include a link appropriate for feedback on that question.
I see threads by peter t davis under your username and it takes me to your google + page. That's neat.