Exora

Exora is a native Windows mail and calendar client designed as a replacement for the retired Windows Mail and Calendar apps. It connects directly to on-premises Microsoft Exchange servers using Exchange Web Services, supporting NTLM and modern OAuth2/OpenID Connect authentication without routing mail through a cloud relay. The application handles mail, calendar, contacts, tasks, folders, public folders, and online archives, and it also works with Microsoft 365, Gmail, and IMAP/SMTP accounts alongside CalDAV calendars. It is built on WinUI 3 and .NET 10, runs on Windows 10 and Windows 11, and is distributed as free and open-source software under the GPL-3.0 license.

Exora speaks Exchange Web Services directly, so your server stays the only thing that ever sees your mail. It supports NTLM or modern OAuth2 / OpenID Connect against ADFS-shaped providers and includes features like Autodiscover, including domain-joined SCP lookup. Streaming notifications allow new mail to arrive without waiting for a poll, and server-side inbox rules can be read, edited, and run on demand. Public folders and the online archive are available in the same tree, along with Global Address List lookup while typing a recipient. Junk lists stay in sync with the ones on the server, ensuring consistent filtering across devices.

Exora is built on WinUI 3 and .NET 10, making it a real Windows app rather than a web page in a window. Every account is managed in one place, supporting on-premises Exchange, Microsoft 365, Gmail, and any IMAP/SMTP server, with CalDAV calendars alongside them. Users can create and edit events, manage attendees and reminders, keep contact groups, and search the address book. Additionally, rules and tasks allow reading and editing inbox rules that live on the server, running them over a folder on demand, and turning a message into a task.

Exora is designed with privacy as a core principle, ensuring that your mail never passes through the company. There is no Exora account required, no sync service, and no third party in the path between your PC and your mail server. Messages, calendars, and contacts are stored only on your device, with no telemetry or diagnostic reports unless explicitly turned on. Credentials are encrypted at rest using Windows data protection, and remote images and tracking pixels are blocked by default to enhance security.

Exora operates as free and open-source software under the GPL-3.0 license, requiring no account or subscription to use. The application works offline, allowing synced mail, calendars, and contacts to remain readable and searchable without a connection. Queued actions replay when the device reconnects to the network, ensuring continuous functionality. The software is forked from Wino Mail, providing a familiar foundation for users familiar with the upstream project.

Exora is specifically designed for users with self-hosted mailboxes on their own Exchange servers. It is ideal for organizations that need a native Windows experience without relying on cloud relays or mailbox migrations. The application supports a wide range of protocols, including IMAP/SMTP and CalDAV, making it versatile for various server configurations. It is particularly suited for those who value a direct connection to their mail server with minimal intermediaries.

Exora is built on WinUI 3 and .NET 10, providing a modern and responsive user interface. The application includes system themes, toast notifications, and background sync capabilities. It features a taskbar that behaves like a native Windows app, enhancing the overall user experience. The design ensures that the application integrates seamlessly with the Windows operating system, offering a familiar and efficient workflow for managing email and calendar tasks.

Exora supports multiple authentication methods, including NTLM and modern OAuth2 / OpenID Connect. It is compatible with ADFS-shaped providers, allowing seamless integration with various identity management systems. The application also includes Autodiscover functionality, including domain-joined SCP lookup, to simplify account setup. Streaming notifications ensure that new mail arrives immediately without the need for periodic polling, enhancing real-time communication.

Exora is a fork of Wino Mail, distributed under the GNU General Public License v3.0. The upstream project is maintained by Burak Köse, and the code is available for review and modification. This open-source nature allows users to inspect the code, build it themselves, or contribute to its development. The GPL-3.0 license ensures that the software remains free and accessible to all users.

Exora is designed to work with a variety of email and calendar services, including on-premises Exchange, Microsoft 365, Gmail, and any IMAP/SMTP server. It also supports CalDAV calendars, providing a comprehensive solution for managing multiple accounts. The application handles mail, calendar, contacts, tasks, folders, public folders, and online archives, making it a versatile tool for personal and professional use. Its ability to integrate with these diverse services ensures that users can manage their communications efficiently.

Exora is a native Windows application that runs on Windows 10 (1809) and Windows 11. It is built using WinUI 3 and .NET 10, ensuring compatibility with modern Windows operating systems. The application is distributed as free and open-source software, allowing users to download and use it without any cost. Its design and architecture are optimized for performance and reliability on these platforms.

The official website of Exora is exora.email.