Change to 1 email notification?

Hi All,
Is it possible to configure Web Wiz so only 1 email notification is sent to a user until they come back to the forum? I'm sure you know how it works, but let me walk thorugh it. The way it is now if user A makes a post in a thread and selects "email notifiy me of replies" he gets an email for every reply, so user B, C and D post and user A gets 3 emails. What I'd like to do is have them get 1 email saying a post has been made in the thread and not send them any more notifications until they come back to the forum.

That way their inbox won't be filled with messages about "A message has been posted in the forum..."

vBulletin works this way, and I belive Snitz does but they don't have some of the other features in Webwiz that I like.

Any suggestions?

Thanks