Maybe we have a different idea about what is a virtual mailbox?

It is like a saved search, updated as new mail comes in, or is moved.

Where do you see it on Pandora?

Thanks!

Now I am looking at call forwarding (and text forwarding.)

E.g.  I was thinking of going paid with Talkatone - $4 a month.
That opens up forwarding, and It would be nice if I can call Skype or flip-phone, which ringggggg.
(it seems to be only SMS-->SMS and Voice-->Voice)

Also I want to see if Twilio has a phone call, rather than text, mode.
(Already using Twilio in biz to send out SMS.)

I also plan Android testing, maybe using Tasker. 
The architecture is more open for ringing, and in the house it can run off the cable wireless with a cheap leftover tablet. 

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This explains the idea.

Voice SMS – text to phone call
https://tellustalk.wordpress.com/2015/02/26/voice-sms-text-to-phone-call/
Very smart if you for example have an alarm system that would send SMS to people that are on call sleeping. The tiny little signal from an SMS you could easily sleep through, but a call will keep ringing until you pick the phone up! It could be smart to combine it with an SMS too, to make it easier to read it again later, when you´re up…