Alternativ till NeutronMail för JavaScript med kommersiell licens

• JavaScript
  Alla plattformar Windows Mac Linux Android iPhone Android Wear iPad Web Self-Hosted Software as a Service (SaaS) PHP JavaScript Windows Mobile Java Mobile S60 Docker Cloudron OpenPGP Kubernetes S/MIME OpenShift DAVdroid
• Kommersiell licens
  Eventuell licens Gratis licens Open Source-licens Kommersiell licens