No!
The option you ask for shouldn't be needed as you can "Subscribe" to any topic, sub-forum or forum. When subscribed you get an email of every post made within the respective area. When you don't wish to receive any more messages you just unsubscribe.
Go to the topic, sub-forum or forum in question and select:
Options > Subscribe via email
You then are sent to screen which offers further options to limit the messages you will receive.
Note: If you subscribe at a level higher than "Topic" and then look at subscriptions at a lower level you will not appear to be subscribed - however, you will get the mail requested. If you are tempted to subscribe at a lower level as well, you'll start to get duplicate messages.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.