Alternatives to Atmail Email Server for all platforms with Open Source License

  • Mailpile

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and...

    Free Open Source Mac Windows Linux Web Self-Hosted ... OpenPGP

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  • Roundcube

    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client...

    • Roundcube and Atmail are both the interfaces to self-hosted webmail. Some hosted services might also choose either (or both) to offer to customers as a way of using their webmail. Atmail is the more shiny; Roundcube more established. JohnFastmanJan 2017 Disagree   Agree

    Free Open Source Self-Hosted PHP Cloudron

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  • Rainloop

    Simple, modern & fast web-based email client. Modest system requirements, decent performance, simple installation and upgrade, no database required. All these make...

    Free Open Source Self-Hosted JavaScript PHP Cloudron

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  • Squirrelmail

    SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure...

    Free Open Source Self-Hosted PHP

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  • Horde

    Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards...

    Free Open Source Web Self-Hosted

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  • Webmail Lite

    Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail...

    Free Open Source Web Self-Hosted

    No features added Add a feature

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  • Citadel

    Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel...

    Free Open Source Linux Web

  • Inboxer

    Unofficial, free and open-source Google Inbox Desktop App. Built using electron, Inboxer includes a menu bar which is globalmenu compatible and works, and keyboard...

    Free Open Source Mac Windows Linux

    No features added Add a feature

    Inboxer icon
  • NaSMail

    NaSMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in HTML 4.01...

    Free Open Source Web

    No features added Add a feature

    NaSMail icon
  • Sendmail

    Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including the Simple Mail Transfer Protocol...

    Free Open Source Mac Linux

    No features added Add a feature

    Sendmail icon

Platforms

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