Is it possible to receive an email when one of my posts is responded to?
Next to the 'Post Reply' button at the top and bottom of the topic page there's a little spanner. When you mouse over it you get a 'Subscribe topic'
option. Click that.
Clicking the button again will unsubscribe you.
Also, go to the Notifications link (upper right) and click 'Settings'. Make sure you have the box ticked to allow email to be sent on subscribed topics.