Nextcloud Mail is a secure and private email service from Nextcloud. It offers end-to-end encryption, secure storage, and powerful collaboration tools. It has a modern, intuitive user interface that makes it easy to compose, send and manage emails. It also includes calendar integration, contacts management, and task management. Nextcloud Mail is integrated with other Nextcloud services such as Files and Talk, allowing users to collaborate and share information securely. It is designed to meet the needs of businesses, organizations, and individuals who are looking for a secure and private email service.
Discontinued Opera Mail is no longer updated and no longer supported, but the latest version, 1.0.1044, released in February 2016, can still be downloaded from the official website.