@PadreMio
1st, you have to be a Swisscom/Bluewin customer with a Swisscom Login Account and a included "Service package Classic" Abo and an active vwxyz@bluewin.ch Mailaccount.
2nd, for sendig SMS via Email by Swisscom/Bluewin Account, you don't need a Gateway, just the conditions above
3rd, (maybe, i am not sure) if you don't use the webmail client for sending, you have to be logged in at a Swisscom Internet connection while sendig from Outlook or another mailclient...