Alternatívy programu NeutronMail pre PHP s licenciou zadarmo

• PHP
  Všetky platformy 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
• Bezplatná licencia
  Akákoľvek licencia Bezplatná licencia Licencia Open Source Obchodná licencia