Haraka alternatives

Nearest on its board

1. 24
   D

   Dovecotdovecot.org

   Dovecot Community Edition is an open-source email server.

   5.8 APIOpenFree Free tier
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2. 26
   ME

   Microsoft Exchange Onlinemicrosoft.com

   Exchange Online is hosted email for business, with email, calendar, and contacts accessible across major browsers and devices.

   5.6 APIOpenFree —
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3. 23
   O

   OpenSMTPDopensmtpd.org

   OpenSMTPD implements server-side SMTP and lets machines exchange email with systems that speak SMTP.

   5.9 APIOpenFree Free tier
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4. 27
   KC

   Kerio Connectsupport.kerioconnect.gfi.com

   Kerio Connect is an email and instant messaging server with multiple deployment options, Outlook integration, web email, and mobile access.

   5.6 APIOpenFree —
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5. 22
   AJ

   Apache Jamesjames.apache.org

   Apache James is a modular mail server running on the JVM.

   5.9 APIOpenFree Free tier
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6. 28
   MM

   MDaemon Messaging Servermdaemon.com

   MDaemon is a Windows email server positioned as an alternative to Microsoft Exchange and Microsoft 365.

   5.6 APIOpenFree —
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7. 21
   MM

   Maddy Mail Servermaddy.email

   Maddy implements the functionality to send and receive email over SMTP and store messages with IMAP access.

   5.9 APIOpenFree Free tier
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8. 29
   ZS

   Zentyal Serverzentyal.com
   5.4 APIOpenFree Free tier · from $230/yr (lower tiers unpriced)
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9. 20
   I

   IceWarpicewarp.com

   IceWarp is an all-in-one collaboration platform combining email, messaging, video conferencing, file sharing, and real-time document collaboration in one…

   5.9 APIOpenFree From $1.35/mo
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10. 30
    CP

    CommuniGate Procommunigate.com

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

    5.2 APIOpenFree —
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11. 19
    CI

    Cyrus IMAPcyrusimap.org

    Cyrus IMAP is an email, contacts, and calendar server.

    5.9 APIOpenFree Free tier
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12. 31
    HD

    HCL Dominohcl-software.com
    5.2 APIOpenFree —
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13. 18
    ZC

    Zimbra Collaborationzimbra.com

    Zimbra is an enterprise email and collaboration suite with email, calendar, contacts, tasks, and file sharing.

    6.0 APIOpenFree Free tier
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14. 32
    V

    vSMTPviridit.com
    4.8 APIOpenFree Free tier
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15. 17
    PI

    poste.ioposte.io

    Poste.io is a self-hosted email server with web administration, webmail, spam protection, and mail server components in one Docker container.

    6.0 APIOpenFree Free tier · from $349/yr
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16. 33
    OX

    Open-Xchange App Suiteox.io
    4.3 APIOpenFree —
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17. 16
    H

    hMailServerhmailserver.com

    hMailServer is a self-hosted mail server that supports SMTP, IMAP and POP3.

    6.0 APIOpenFree Free tier
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18. 34
    P

    PowerMTAbird.com
    3.8 APIOpenFree —
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19. 15
    M

    Modoboamodoboa.org

    Modoboa is an open-source platform for installing and managing a self-hosted email server.

    6.1 APIOpenFree Free tier · from €139/yr
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20. 14
    P

    Postfixpostfix.org

    Postfix aims to be fast, easy to administer, and secure.

    6.1 APIOpenFree Free tier
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