Top Alternatives to iRedMail

UV Outliner is a discontinued, single-pane outliner known for its hierarchical structure and multicolumn support. It aimed to provide a flexible platform for note-taking, task management, novel writing, and brainstorming through a clean design and various integration options.

mail.com is a comprehensive web portal and email service provider, offering a robust webmail platform alongside news, entertainment, and cloud storage features, catering to users seeking a blend of communication and online utility tools.

Zimbra Collaboration Suite is a comprehensive open source email and collaboration platform designed for businesses. It provides a secure and feature-rich environment for email, calendaring, contacts, tasks, and file sharing, supporting on-premises and cloud deployments.

Horde Groupware is a free, web-based suite of applications designed for collaboration and productivity. Built on the robust Horde framework, it offers a comprehensive set of tools including webmail, calendar, task management, and note-taking, providing an integrated platform for individuals and teams.

hMailServer is a robust and free open-source email server designed for Microsoft Windows environments. It provides comprehensive support for standard email protocols like POP3, IMAP, and SMTP, making it a versatile solution for both small businesses and individual users needing a self-hosted mail service.

Autistici / Inventati is a platform dedicated to providing secure and private digital tools primarily for activists, social movements, and collectives globally. It offers a suite of services including encrypted webmail, web hosting, and anonymity tools, emphasizing user privacy and self-defense against surveillance.

Feng Office is a robust open-source web-based platform designed to enhance team collaboration and productivity. It integrates project management, task tracking, document management, and CRM capabilities into a single solution, catering to businesses of various sizes.

Microsoft Exchange Server is a robust mail and calendaring server designed for businesses of all sizes, providing enterprise-grade email, calendaring, and contact management capabilities.

AOL Mail is a free web-based email service offering reliable communication tools, generous storage, and integrated features like calendar and cloud storage, suitable for individuals and small businesses seeking a straightforward email solution.

MDaemon Messaging Server is a comprehensive email server solution designed for businesses of all sizes. Offering robust security, flexible deployment options, and integrated collaboration tools, it provides a powerful alternative to cloud-based email services.

Zarafa is an open-source groupware and email server platform, providing powerful collaborative features similar to Microsoft Exchange but with flexibility and cost advantages. It offers email, calendaring, contacts, and task management.

mailcow is a comprehensive open-source mail server suite built on Docker, providing a robust and secure platform for self-hosting email. It integrates various components like Postfix, Dovecot, and SOGo into a single, easy-to-manage system.