Alternativy k Mail.be pro Windows S s licencí open source

• Windows S
  Všechny platformy Windows Mac Linux Chrome OS Android iPhone Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) JavaScript Python Windows Mobile Java Mobile S60 Android TV Chrome MetaMask Gmail ZeroNet OpenPGP DAVdroid
• Licence Open Source
  Jakákoli licence Bezplatná licence Licence Open Source Komerční licence