Please add an option to the Outgoing Gateway, 'Deliver locally if user exists', like you do in the Domain Location.

Right now all local deliveries via webmail are delivered locally and that should be an option. I want all mail to use the Outgoing Gateway including local deliveries sent via webmail. I use an attachment SMTP server and I need all mail to pass though there, especially local mail. Domain Location when set to external never delivers local mail when 'Deliver locally if user exists' is not checked. And if checked, never sends to the attachment server,