One inbox, every account
Gmail, Outlook and Microsoft 365, and any IMAP provider, side by side or merged into one list. Each account keeps its own color so you always know where a message came from.
Alphav0.1.5 for Windows and Linux
One inbox for every account. Fast, private, and yours.
Flux Mail brings your Gmail, Outlook, and IMAP accounts together in one desktop app, with calendar and contacts built in. New mail lands in seconds, your messages stay on your machine, and nobody gets into your inbox until you say so.
- Windows
- Linux
- macOSsoon
Works with
- Gmail
- Google Workspace
- Outlook.com
- Microsoft 365
- IMAP & SMTP
- Google Calendar
- CalDAV
What it does
Everything a mail client should do, and a few things it shouldn't need to ask.
You decide who gets in
A new sender waits in Needs Review until you approve them, with one click for a person or a whole company. Block a sender and their mail moves out on the server, not just on your screen.
Newsletters and notifications, sorted
Bulk mail folds into two neat cards instead of burying what matters. Move a sender between Inbox, Newsletters, and Notifications once, and every future message follows.
Calendar and contacts built in
Google, Microsoft, and CalDAV calendars in one view, with invites, RSVPs, and recurring events. Contacts from Google and Microsoft, editable in place, and offered as you type an address.
Fast, and instant where it counts
New mail shows up within seconds. Search covers everything you've downloaded and answers as you type. Every common action has a keyboard shortcut, and nothing waits on a spinner.
Write the way you want
Rich text with fonts, colors, pictures, and links. A signature per account, Reply All that knows who you are, undo send, send later, and a quoted original that arrives exactly as it was sent.
Snooze, rules, and folders
Snooze a conversation and it comes back on top, unread, when you're ready. Rules file mail as it arrives. Create, rename, and drag mail into folders on every provider.
Private by default
Remote images are blocked until you ask, so senders can't see when you read. Your mail lives in a database on your own machine, and passwords and tokens stay in the operating system's keychain.
Take a look
The same app, in the light or the dark.
Every screen follows your system's theme. These are the real screens with made-up mail.
Three accounts in one list, each in its own color. New senders wait in Needs Review until you let them in.
Privacy
Your mail stays on your computer.
Flux Mail talks directly to your mail provider. There is no Flux account, no server of ours in the middle, and nothing we could read even if we wanted to.
Read the privacy policy- No middleman. Mail, calendar, and contacts sync straight from Google, Microsoft, or your IMAP server to your machine.
- Tracking pixels blocked. Images load only when you choose, per message or per sender you trust.
- Secrets in the keychain. Passwords and sign-in tokens are stored by Windows, macOS, or your Linux desktop, never in a file we manage.
- Signed updates. The app updates itself only to a build signed with our key.
- Nothing phones home. No analytics, no telemetry, no crash reporting. Every network connection the app makes is listed in the privacy policy.
FAQ
Questions people ask before they try it.
What does it cost?
Nothing during the alpha. We expect to offer paid plans later, and we'll say what they cost and what stays free before anything changes.
Which accounts work?
Gmail and Google Workspace, Outlook.com and Microsoft 365, and any IMAP provider such as Fastmail, iCloud, Yahoo, or your own server. Calendars from Google, Microsoft, and CalDAV. Contacts from Google and Microsoft.
Where is my mail stored?
In a database in your own user folder, on the computer where you installed the app. Flux Mail has no servers of its own and no account to sign up for. The privacy policy lists everything the app stores and every server it talks to.
Why does it ask for full access to my Google account's mail?
Gmail offers two permission levels for a mail client, and the narrower one can't permanently delete messages. Empty Trash and Empty Spam need that, so the app asks for the wider permission. Everything it does with the permission is listed in the privacy policy, and your data never leaves your computer.
When does macOS arrive?
During the alpha. Windows (x64 and ARM64) and Linux (.deb, .rpm, and AppImage) are available now.
Is it really ready to use?
It's alpha software. The people using it today run it as their daily client, and it still has rough edges. Keep your current client around, and tell us what breaks.
Alpha program
Help shape Flux Mail.
We're looking for people who live in their inbox and will tell us what's wrong with ours. Alpha testers get every build first and a direct line to the people building it.
- Windows builds are ready now (x64 and ARM64).
- Linux builds are ready now (.deb, .rpm, and AppImage).
- macOS builds open during the alpha.
- It's alpha software: expect rough edges, and keep your current client around.
Flux Mail is built by Eerie Labs LLC.