AB will send you an email if:
(a) you've got that option selected in your profile preferences ; or
(b) you've ticked the box to get an email when somebody answers your question ; or
(c) you've clicked the 'Subscribe' button on a thread.
To stop (b) and (c) from happening, simply don't tick the box (or click 'Subscribe').
To stop (a) from happening, click on 'View Your Profile', then on 'Edit My Profile' . Remove the tick alongside 'Subscribe to all my own questions' and click 'Submit'.