Hopefully I'm understanding this correctly: you're creating a service that lets you send emails securely using your hosted SMTP, from anywhere in the world?
Yes, that's the one. There are more than one available. I'm not going to spam the name of mine.
It's a service I wanted myself as an early adopter of handheld computers, outgoing SMTP is one of those things where the ISP does everything it can to make you use user@mobileisp.com and even when it is plain, remembering the settings if your phone gets wiped, is it mail.example.isp.com or smtp.example.isp.com. Hopefully it is a bit easier to remember the smtp service one uses.
Useful for traveling on business, I would assume!