Communication·Standings

Mail Server Software — page 2

  • 34 platforms
  • 1 with a public API on this page
  • 2 with a free tier
  • Checked 23 Sept 2026
  • Showing 26–34
  1. 26
    ME
    Microsoft Exchange Onlinemicrosoft.com

    Hosted business email with calendars and contacts for browsers and major devices.

    5.6 APIOpenFree —
  2. 27
    KC
    Kerio Connectsupport.kerioconnect.gfi.com

    Paid email and messaging server with Outlook, web, mobile, calendar, and contact support.

    5.6 APIOpenFree —
  3. 28
    MM
    MDaemon Messaging Servermdaemon.com

    A Windows mail server with webmail, calendars, contacts, and SMTP, POP3, and IMAP4 support.

    5.6 APIOpenFree —
  4. 29
    ZS
    Zentyal Serverzentyal.com

    A Linux server offering a free plan and paid options for email management.

    5.4 APIOpenFree Free tier · from $230/yr (lower tiers unpriced)
  5. 30
    CP
    CommuniGate Procommunigate.com

    CommuniGate Pro is a unified communications server for email, calendaring, VoIP, video, instant messaging, and whiteboards.

    5.2 APIOpenFree —
  6. 31
    HD
    HCL Dominohcl-software.com

    Paid secure email and application server with REST APIs, browser access, and mobile support.

    5.2 APIOpenFree —
  7. 32
    V
    vSMTPviridit.com

    A free, open-source Linux mail transfer agent with SMTP and MIME filtering.

    4.8 APIOpenFree Free tier
  8. 33
    OX
    Open-Xchange App Suiteox.io

    A subscription webmail suite with IMAP/POP3 access and mobile sync.

    4.3 APIOpenFree —
  9. 34
    P
    PowerMTAbird.com

    A paid mail server with dedicated IP options and event webhooks.

    3.8 APIOpenFree —

Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure