Free and open first
Best Email Server Software in 2026 — page 2
- 33 apps
- Research read 24 Oct 2026
- How the order is worked out
- 26
Synology MailPlus Server
Free plan AndroidiPhoneWeb - 27
Microsoft Exchange Online
by Microsoft Exchange OnlinePaid AndroidiPhoneMac+2Exchange Online combines hosted business email with administration, security, and compliance capabilities.
5.6 Visit site - 28
RabiMail
Paid AndroidiPhoneLinux+3 - 29
CommuniGate Pro
Paid LinuxMacWindows - 30
EVO Mail Server
Paid Windows - 31
GreenArrow Engine On-Premises
Paid Linux - 32
Mailbux Self-Hosted
Paid Linux - 33
MDaemon Email Server
Paid WebWindows