I see. Well, this very specific scenario could be problem then, that’s true. However, there is a simple workaround for this – you can handle it by e-mail redirection or forwarding. What do I mean? You can have one root e-mail address used in this property where notification e-mail are being sent to and a few redirection / forward rules, so the e-mail is immediately send to other e-mail addresses as well, depending on your redirection / forward rules.
Or, you can suggest a feature in some of the future versions at http://www.kentico.com/Support/Suggest-feature