How can a Q&A user decide if he wants to receive emails for new questions?

Hi,

I would like to know how can a user decide if he wants to receive an email notification for each new question without leaving the frontend. It would be really nice if this could be configured on the user profile (only seen by logged in users, of course).

Can this be achieved? Does it exist today? If not, how can I submit a feature request?

Thanks in advance,
Nuno