The best 5 free open source independent email server systems are recommended, just read this article!

The best 5 free open source independent email server systems are recommended, just read this article!

Due to the needs of the company, we may need to set up a mail server system. Is Microsoft Exchange too complicated? What comes out of GOOGLE is charged! No other free mail server system options?
Here I would like to share with you the 5 best free and open source email server software.

五款免费开源独立email邮件系统

 Related reading:

 5 Best Free Open Source Mail Server Software

1. IRedMail

iRedMail is entirely built on open source software and is a full-featured email system. Support: POP3/IMAP/SMTP over TLS, webmail with HTTPS. Supported: Webmail, Calendars/Contacts/ActiveSync * , Antivirus & Antispam Antispam & Antivirus.

Official website: https://www.iredmail.org/

2. Mailcow

A full-featured mail server deployed through docker, which is very convenient to deploy.

Official website:https://mailcow.email/

3. Mail-in-a-Box

Mail-in-a-Box is free, open source software developed by Joshua Tauberer for mail server hosting. The goal of this software is to enable any user to convert a brand new cloud system into a mail server in a matter of hours.

The tool enables developers to host mail for multiple users and multiple domains while controlling the entire process from top to bottom. The default configuration of the software provides a spam detection system, monitoring, reporting and backup mechanisms.

Official website: https://mailinabox.email/

4. sogo.nu

A mail server with a poor UI. Although the production team boasts about it, it is still a classic mailbox software.

This is what they said:

SOGo is a fully supported and trusted groupware server with a focus on scalability and open standards. SOGo is released under GNU GPL/LGPL v2 and above.

SOGo provides a rich AJAX-based web interface and supports a variety of native clients by using standard protocols such as CalDAV, CardDAV and GroupDAV, as well as Microsoft ActiveSync.

SOGo is the missing piece of your infrastructure ; it sits in the middle of your servers and provides your users with a unified and complete interface to access their information. It has been deployed in production environments involving thousands of users.

Official website: sogo.nu

5. Modoboa

Open source email mailbox system, the merchant said:

Modoboa brings together the best open source tools to install, configure and secure your own email server.

An email server generated by Modoboa provides you with the same functionality as a typical hosting service.

Webmail: Consult email via a web navigator
Calendar management
Address book management
Create filtering rules to organize emails
Auto answer
Create unlimited domain names, email addresses and aliases
Administrator tools: statistics, migration tools…

No more need to install each component individually, Modoboa’s installer handles 95% of the job in less than 10 minutes. You just need to configure your DNS.

Official website: https://modoboa.org/en

 Summarize:

This is the most popular open source email system. Don’t look for other ones. These free email systems are enough.

Note that what is solved here is the basic problem of receiving/sending/storing/using emails. If you need to send emails without being intercepted by external domains (gmail qq 163 hotmail), you can consider using https://mxroute.com/ to solve the problem. Outbound channel problem.

The email client system is an integrated system with simple requirements but complex deployment operations. In addition to basic functions, it also has other office security requirements such as forwarding. You need to accurately grasp the system technology selection.

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