Stalwart Mail Server alternatives

Nearest on its board

1. 4
   S

   SmarterMailsmartertools.com

   SmarterMail is an email, groupware, and collaboration server positioned as an alternative to Microsoft Exchange.

   6.3 APIOpenFree Free tier · from $500/yr
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2. 6
   I

   iRedMailiredmail.org

   iRedMail is open-source software for deploying a full-featured mail server.

   6.2 APIOpenFree Free tier · from $10/yr
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3. 3
   M

   MailEnablemailenable.com

   MailEnable is a hosted messaging software suite for the Microsoft platform.

   6.3 APIOpenFree Free tier · $395 one-time
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4. 7
   M

   Mailumailu.io

   The project aims to provide an easily set up and maintained full-featured mail server without proprietary software or unrelated groupware features.

   6.2 APIOpenFree Free tier
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5. 2
   M

   mailcowmailcow.email

   mailcow: dockerized is an open-source groupware and email suite based on Docker.

   6.4 APIOpenFree Free tier · from €8.90/mo
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6. 8
   E

   Eximexim.org

   Exim is a mail transfer agent for hosts running Unix or Unix-like operating systems.

   6.2 APIOpenFree Free tier
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7. 1
   A

   Axigenaxigen.com

   Axigen is an all-in-one email, calendaring, and collaboration platform for organizations from small businesses to large service providers.

   6.4 APIOpenFree Free tier
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8. 9
   MI

   Mail-in-a-Boxmailinabox.email

   Mail-in-a-Box turns a fresh cloud computer into a mail server that lets users run their own email service.

   6.1 APIOpenFree Free tier
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9. 10
   P

   Postfixpostfix.org

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

   6.1 APIOpenFree Free tier
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10. 11
    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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11. 12
    DM

    Docker Mailserverdocker-mailserver.github.io

    Docker Mailserver is a production-ready full-stack mail server providing SMTP, IMAP, LDAP, anti-spam and anti-virus in a container.

    6.0 APIOpenFree Free tier
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12. 13
    PM

    Pegasus Mailpmail.com

    Pegasus Mail is a free, standards-based email client for one or multiple users on a computer or local area network.

    6.0 APIOpenFree Free tier
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13. 14
    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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14. 15
    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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15. 16
    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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16. 17
    CI

    Cyrus IMAPcyrusimap.org

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

    5.9 APIOpenFree Free tier
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17. 18
    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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18. 19
    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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19. 20
    D

    Dovecotdovecot.org

    Dovecot Community Edition is an open-source email server.

    5.8 APIOpenFree Free tier
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20. 21
    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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