Open Source Alternatives to Zoho Mail

A secure email platform that provides professional business email hosting using custom domains. It offers features for organization management including an admin console for user configuration, email retention for compliance, and e-discovery tools. The service includes security measures such as encryption at rest and in transit, S/MIME encryption, and spam and virus filtering. It is designed for businesses of various sizes, from startups to large enterprises, and can be deployed via web browsers or native mobile applications. The platform integrates with other productivity tools and supports migration from other email providers via POP and IMAP. It also includes collaborative features like Streams to replace email threads with comments and task management.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Zoho Mail 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 Zoho Mail. The most popular is Docker Mailserver. It uses the MIT license and ships an official Docker image.