Does anyone know if there's an in-built or plugin way to achieve the following:

Sometimes I send an email and I would like to know as soon as a reply to that email is received. I don't like alerts in general, and have no audio or visual notifications for new emails arriving. I do have a rule that creates a popup alert when emails from a particular (important) sender are received. But what I'm looking for is a way to "tag" a one-off email such that Outlook will notify me as soon as a reply to that email has been received.

Possible?