I think this is a great idea. Why don't you make it an ER ?
I've just hit exactly the same problem!
My work around is going to have to be some custom .Net work to create a second outbound mail engine. In theory it can send the emails which the LANDesk service does not. Hopefully it will be quite straight forward since the email content is created if the Is Active is ticked (I think) and is just sitting in the database as it will not have anyone to send to. I could then link back to the main object and get the field with the email addres(es).