I believe the documentation for WebNotify is incorrect. It states that a WikiName? or an email address can be used for mail notification. This does not appear to be correct. An email address fails the VIEW permission check in WebNotify::processChange and no emails are sent. A WikiName? succeeds.
If you answer a question - or have a question you asked answered by someone - please remember to edit the page and set the status to answered. The status is in a drop-down list below the edit box.
Sorry, closing this question after more than 30 days of inactivity. Feel free to re-open if needed.
-- PeterThoeny - 03 Jun 2008