Best Communication - Email - Complete Solutions software in 2026

AnonAddy

anonaddy.com

Open source

Email forwarding service for creating aliases.

b1gMail

b1gmail.eu

Open source

Complete email solution that runs on any webspace with PHP and MariaDB. It supports POP3 catchall mailboxes and can also integrate with Postfix or b1gMailServer if you're running your own server.

DebOps

docs.debops.org

Open source

Your Debian-based data center in a box. A set of general-purpose Ansible roles that can be used to manage Debian or Ubuntu hosts.

docker-mailserver

docker-mailserver.github.io

Open source

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

Dovel

dovel.email

Open source

SMTP server that sends and receives emails according to a simple configuration file, with an optional web interface that you can use to browse your emails.

emailwiz

github.com

Open source

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

Inboxen

inboxen.org

Open source

Lets you have an infinite number of unique inboxes.

iRedMail

iredmail.org

Open source

Full-featured mail server solution based on Postfix and Dovecot.

Maddy Mail Server

maddy.email

Open source

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

Mail-in-a-Box

mailinabox.email

Open source

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

Mailcow

mailcow.email

Open source

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

Mailu

mailu.io

Open source

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

Modoboa

modoboa.org

Open source

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

Mox

xmox.nl

Open source

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 with ACME and Let's Encrypt, account autoconfiguration, and webmail.

Postal

docs.postalserver.io

Open source

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

Simple NixOS Mailserver

gitlab.com

Open source

Complete mailserver solution leveraging the Nix Ecosystem.

SimpleLogin

simplelogin.io

Open source

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

Stalwart Mail Server

stalw.art

Open source

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

wildduck

wildduck.email

Open source

Scalable no-SPOF IMAP/POP3 mail server.