Notification of new posts is done in your forum profile - modify your subscription to change notification behavior
Your forum account has been successfully deleted - there should be no further eMail notifications about new post to you.
Another option to manage subscripton - the one I always chose now for its greater work/cost-efficiency is to simply delete the forum account
In general and valid for all forums worldwide - all members of forums are responsible for updated and valid profile data and notification options. While forums are normally a free service by its operators - all forums use up substantial bandwidth, many working-hours for care and maintenance and even move hours for monitoring or answering - hence the operation of a forum always is a most expensive add on to a web site. in addition a forum always constitutes one of the greatest security risks on a website.
Therefore please consider carefully whether you really want to actively participate in a forum or use the forum's counseling services or whether you just subscribe for curiosity because its free for you ...
God bless
hans