You can also choose to receive an e-mail notification anytime someone replies to one of your entries or comments. To do this, check the box next to "Get message board replies". You can also select whether you would like to receive plain text e-mails or HTML-enhanced ones. Once you have configured your settings, you can save them by clicking the button labeled "Save Changes" towards the bottom of the page.
If you would ever like to stop receiving comment notifications, you can simply uncheck the "Get message board replies" box and then save your changes. After doing so, notifications will no longer be sent to you via e-mail unless you choose to have them sent again in the future.