Tag

Tuta offers free, privacy-focused email and calendar with quantum-resistant encryption.

Modoboa is an open source email server with a modern web interface for easy management.

Monorepo for ProtonMail's web clients, facilitating secure email services.

An open-source digital suite for secure corporate and personal use with chat, mail, and drive.

MailCatcher runs a simple SMTP server to catch and display emails in a web interface for testing.

FreeScout is a free, open-source help desk and shared inbox, a self-hosted alternative to Zendesk and Help Scout.

Open-source mail and collaboration server with modern features, security, and scalability.

SOGo is a free, open-source webmail and groupware server for businesses and communities.

A Docker-based mail server suite combining Postfix, Dovecot, and more for easy email management.

Mailu is a Docker-based, full-featured mail server solution for easy setup and maintenance.

Haraka is an open source SMTP server written in Node.js, offering high performance and flexibility.

Web and API based SMTP testing tool for developers.