[Len]

You need to unsubscribe to the threads that you have posted in.

To do this, go to the threads were you made your posts and click on the “threads tool” button located on the bar above the posts. Then click on the” unsubscribe to thread” button. By doing this the next time someone makes a post in that thread you will not be sent a notification e-mail.
You can also unsubscribe to threads in your control panel as mick suggested