Notify when sending out quote without emailadress

In some cases the recieving contact doesn't have an email adress added in AutoTask. In this case, if I would send a quote to this contact, it would send it without a notification that this client doesn't have an email adress added. Which means, without a sign, that the quote is "sent for approval" to nowhere.

Is it possible to add a notification when the contact doesn't have an email adress.