Alternativa Netrepid Hosted Exchange Servicesu za VirtualBox z licenco odprtokodnega vira

• VirtualBox
  Vse platforme Windows Mac Linux Android iPhone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) BSD Microsoft Office Outlook Thunderbird VMware vSphere Hypervisor Cloudron OpenPGP VirtualBox
• Open Source licenca
  Vsako dovoljenje Brezplačna licenca Open Source licenca Trgovsko dovoljenje