NeutronMail

Self-hosted server for the ProtonMail client.

19 Alternatives To NeutronMail

Cypht

All your E-mail, from all your accounts, in one place. Cypht is like a news reader, but for E-mail.

Horde

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Mail-in-a-box

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Mailpile

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
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Postfix Admin

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases.
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ProtonMail

Secure email with absolutely no compromises. Get your free encrypted email account today.

Rainloop

RainLoop is a web based email client.

Roundcube

Web-based IMAP email client

Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP.
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Turing Email

Turing. Modern email has arrived. Turing Email supports email providers including Google Apps, Outlook, Yahoo Mail, iCloud Mail, and AOL Mail. Join our exclusive network.
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Webmail Lite

Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server applicatio…

Zimbra Collaboration Suite

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
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Zoho One

Zoho is an all-in-one online office suite.

django-cyradm

django-cyradm is a web interface to manage postfix controlling accounts, aliases and virtual…

iRedMail

A fully fledged, free email server solution, an open source project (GPL v2).

mailcow dockerized

An open source mailserver suite.