Best Mail Server Software in 2026 · page 2
- 26
Maddy Mail Server
Free planLinuxSelf-hosted5.8Free plan - 27
Haraka
Free planSelf-hosted5.7Free plan - 28
Mail-in-a-Box
WebAPILinuxSelf-hosted5.7 - 29
CommuniGate Pro
WebAPILinuxSelf-hosted5.6 - 30
Postfix
LinuxmacOSSelf-hosted5.5 - 31
Zentyal Server
Linux5.5 - 32
Open-Xchange App Suite
AndroidiOSWeb5.2 - 33
vSMTP
Linux4.5 - 344.3