Open Source Alternatives to MDaemon

An email platform that provides email server, security gateway, and archiving solutions for businesses and IT professionals. The software allows for the delivery and maintenance of business email with a focus on security and privacy. It includes capabilities for threat detection, spam and virus protection, data leak prevention, and managed email retention to meet regulatory compliance. The product is available for on-premise deployment on physical or virtual servers, as a hosted cloud service, or through a multi-tenant SaaS model for MSPs and ISPs. It serves various industries including healthcare, legal, and financial services. Users can expand functionality through optional licensed add-ons such as AntiVirus, AntiSpam, and a Connector for Outlook. The system is designed to function as an alternative to Microsoft Exchange and Microsoft 365 by giving organizations complete control over their data and infrastructure.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to MDaemon give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 1 open source alternative to MDaemon. The most popular is Haraka. It uses the MIT license and ships an official Docker image.