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Email Servers Software & Alternatives

Self-hosted mail servers, spam filters and SMTP relay tools.

DragonFly

A modern replacement for Redis and Memcached

30.6K stars open source
Headless CMS NoSQL Databases Traditional CMS

Docker Mailserver

Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configuration files, no SQL database.

18.4K stars open source
Container Management Email Servers

Postal

Complete and fully featured mail server for use by websites & web servers.

16.6K stars open source
Email Servers

Mail In A Box

Turns any Ubuntu server into a fully functional mail server with one command.

15.3K stars open source
Email Servers

BillionMail

BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXz... Read More

15.1K stars open source
Email Marketing Email Servers

Stalwart Mail Server

All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features.

13.1K stars open source
Email Servers Communication

Mailcow

Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.

12.9K stars open source
Email Servers

Tutanota

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

7.7K stars open source
Email Servers Security

Mailu

Simple yet full-featured mail server as a set of Docker images.

7.3K stars open source
Email Servers

Docker Ipsec Vpn Server

Docker image to run an IPsec VPN server, with IPsec/L2TP, Cisco IPsec and IKEv2. Auto-generates server config and supports VPN client setup on Linux, Windows, macOS, iOS and Androi... Read More

7.1K stars open source
VPN & Firewalls Email Servers

SimpleLogin

Open source email alias solution to protect your email address. Comes with browser extensions and mobile apps.

6.7K stars open source
Email Servers Privacy & Anonymity

Maddy Mail Server

All-in-one mail server that implements SMTP (both MTA and MX) and IMAP. Replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC with single daemon.

6K stars open source
Email Servers

Maildev

:mailbox: SMTP Server + Web Interface for viewing and testing emails during development.

5.9K stars open source
Email Servers Testing & QA

Mox

Complete e-mail solution with IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS... Read More

5.7K stars open source
Email Servers

Haraka

Fast, highly extensible, and event driven SMTP server.

5.6K stars open source
Email Servers

Translumo

Advanced real-time screen translator for games, hardcoded subtitles in videos, static text and etc.

5.4K stars open source
Email Servers Screenshot & OCR

AnonAddy

Email forwarding service for creating aliases.

4.7K stars open source
Email Servers

Gmvault

gmail backup software

3.6K stars open source
Backup Solutions Email Servers

Modoboa

Mail hosting and management platform including a modern and simplified web user interface.

3.5K stars open source
Email Servers

Papercut SMTP

Papercut SMTP -- The Simple Desktop Email Server

3.3K stars open source
Email Servers Testing & QA

Peergos

Secure and private space online where you can store, share and view your photos, videos, music and documents. Also includes a calendar, news feed, task lists, chat and email client... Read More

2.4K stars open source
File Sync & Share Email Servers Personal Dashboards

Emailwiz

Luke Smith's bash script to completely automate the setup of a Postfix/Dovecot/SpamAssassin/OpenDKIM server on debian.

2.2K stars open source
Calendar & Scheduling Email Servers

Wildduck

Scalable no-SPOF IMAP/POP3 mail server.

2.1K stars open source
VPN & Firewalls Email Servers

About Email Servers Software

Best open source mail server alternatives.