Exora
Every account in one place
On-premises Exchange, Microsoft 365, Gmail, and any IMAP/SMTP server, with CalDAV calendars alongside them.
Mail & calendar for Windows
Your Exchange mailbox, natively on Windows.
Exora is a modern replacement for the retired Windows Mail and Calendar apps — and unlike the alternatives, it talks to your on-premises Exchange server directly. No cloud relay, no mailbox migration, no browser tab.
Windows 10 (1809) and Windows 11 · x64 · free and open source under GPL-3.0
The reason Exora exists
First-class on-premises Exchange
Self-hosted mailboxes have quietly run out of good native clients. Exora speaks Exchange Web Services directly, so your server stays the only thing that ever sees your mail.
- EWS, spoken natively — mail, calendar, contacts, tasks and folders
- NTLM or modern OAuth2 / OpenID Connect against ADFS-shaped providers
- Autodiscover, including domain-joined SCP lookup
- Streaming notifications — new mail arrives without waiting for a poll
- Server-side inbox rules you can read, edit and run on demand
- Public folders and the online archive, in the same tree
- Global Address List lookup while you type a recipient
- Junk lists that stay in sync with the ones on the server
What's inside
Everything a mail client should already do
Built on WinUI 3 and .NET 10 — a real Windows app, not a web page in a window.
Calendar and contacts
Create and edit events, manage attendees and reminders, keep contact groups, and search the address book.
Rules and tasks
Read and edit the inbox rules that already live on your server, run them over a folder on demand, and turn a message into a task.
Fast, and stays fast
Metadata syncs first and message bodies are fetched on demand, so a large mailbox opens in about the time a small one does.
Private by default
No account required, no analytics, no ads. Remote images are blocked until you ask for them, and diagnostics stay off unless you turn them on.
A native Windows app
WinUI 3 with real window chrome, system themes, toast notifications, background sync and a taskbar that behaves.
Works offline
Synced mail, calendars and contacts stay readable and searchable without a connection; queued actions replay when you reconnect.
Open source
GPL-3.0, forked from Wino Mail. Read the code, build it yourself, or check exactly what leaves your machine.
Privacy
Your mail never passes through us
Exora connects your PC to your mail server and nothing else. There is no Exora account, no sync service, and no third party in the path.
Read the privacy policy- Messages, calendars and contacts are stored only on your device
- No telemetry — diagnostic reports are off until you switch them on
- Credentials are encrypted at rest with Windows data protection
- Remote images and tracking pixels are blocked by default
- Nothing is sold, shared, or profiled — there is nothing collected to sell
Give your Exchange mailbox a native home
Free, open source, and installed in about a minute.