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Apps · native coming soon

NewAn installable web app (PWA) with push notifications is live today.

Apps for every screen.

Install mbox from your browser today. Native apps for Windows, macOS, Linux, iOS and Android are on the way, with offline mode and keys in your system keychain.

Join the waitlist Install from your browser

Time windows for the native apps are estimates for Phase 1 (Q4 2026 – Q2 2027), not promised dates.

Platforms

Five platforms, one UI.

The native apps share code with the web version, so what you know from the browser arrives with system extras. Until then, you can install the web version.

Soon

Windows 10/11

MSI · NSIS (.exe) · x64 and arm64

Distribution
mbox website, winget
Window (est.)
Phase 1 · Q4 2026 – Q2 2027
Soon

macOS 12+

DMG · Intel and Apple Silicon · notarised

Distribution
mbox website, Homebrew cask
Window (est.)
Phase 1 · Q4 2026 – Q2 2027
Soon

Linux

AppImage · deb · rpm · Flatpak

Distribution
mbox website, Flathub
Window (est.)
Phase 1 · Q4 2026 – Q2 2027
Soon

iOS

Capacitor · Face ID · push without content

Distribution
TestFlight → App Store
Window (est.)
Phase 1 · Q4 2026 – Q2 2027
Soon

Android

Capacitor · fingerprint · FCM or UnifiedPush

Distribution
Test build → Google Play
Window (est.)
Phase 1 · Q4 2026 – Q2 2027

All dates are estimates for a 2–3 person team and are reviewed quarterly. The roadmap always has the current status.

What the app adds

What a browser can't do.

Everything mbox does on the web, plus the native comforts of your system.

Email without internet

Reading recent messages, search and the send queue work on a plane. Everything syncs when the network returns.

Notifications and tray

An unread counter in the tray, and from the notification: Reply, Archive, Snooze. End-to-end encrypted content never shows on the lock screen.

mailto: in mbox

Set mbox as your default mail app and clicking an email address opens a new message.

Keys in the keychain

Your private key stays encrypted with your passphrase. It reaches the system keychain only with your consent, behind biometrics or a PIN.

Signed updates

Updates are verified by signature, with stable and beta channels. Telemetry is off by default.

Light by design

Targets: an installer under 25 MB, a cold start under 2 seconds, under 150 MB of RAM at idle.

⌘K and shortcuts

The same command palette and shortcuts as in the browser, plus a global shortcut for a new message.

mbox Bridge

A local IMAP/SMTP server on 127.0.0.1 that decrypts encrypted mail, so Thunderbird or Outlook can see it too.

Phase 2

Two paths

Two ways to get mbox on your computer.

You don't have to wait for our app if you like your current mail program. IMAP and SMTP come first.

Path A

The mbox app

Tauri 2 · Phase 1.5

The full mbox: AI, tracking, sequences, client-side encryption and offline use, in a small, fast app.

  • Every mbox feature
  • Offline mode and system notifications
  • Keys in the system keychain
Path B

Any client via IMAP/SMTP

Phase 1.4 · first in line

App passwords for sending through SMTP are already available in the Security center. Receiving through IMAP, autoconfiguration and full client support come first among the native pieces. AI, sequences and meeting links stay in the app and the browser.

  • Thunderbird
  • Outlook
  • Apple Mail
  • K-9 Mail
  • App passwords (SMTP) already available in the Security center
  • IMAP for receiving mail: coming soon, Phase 1.4
  • The client itself handles OpenPGP E2E (Thunderbird, for one)
Server settingsPreview — IMAP not live yet
IMAP
imap.mbox.ulewicz.space · 993 · SSL/TLS
SMTP
smtp.mbox.ulewicz.space · 465 (TLS) or 587 (STARTTLS)
Login
full email address
Password
app password from Settings

You’ll find SMTP app passwords in the Security center. Hostnames and ports follow the rollout plan and may change before IMAP launches.

The order of work

First what unlocks the most people, then what adds the most comfort. The installable web version is already here.

  1. 1

    Installable web app (PWA)

    An icon on your desktop or home screen, push notifications, the full mbox with no app store.

    Available
    since launch
  2. 2

    IMAP / SMTP

    Thunderbird, Outlook, Apple Mail and K-9 work with mbox.

    Phase 1.4
    Q4 2026 – Q1 2027 (est.)
  3. 3

    Desktop apps

    Windows, macOS and Linux, including a public beta for testers.

    Phase 1.5
    Q1 – Q2 2027 (est.)
  4. 4

    Mobile apps

    iOS and Android with push without message content and biometric unlock.

    Phase 1.6
    Q1 – Q2 2027 (est.)
  5. 5

    mbox Bridge and YubiKey

    Encrypted mail in standard clients too.

    Phase 2
    from Q3 2027 (est.)
The full roadmap

Works today New

Install mbox from your browser.

mbox is an installable web app (PWA): its own icon, its own window and push notifications for new email. It’s the bridge until native apps arrive.

Open mbox

Chrome and Edge on desktop, Chrome on Android, and Safari on iPhone and iPad (iOS 16.4+, after adding to the Home Screen).

Waitlist

Tell us what you're after.

We have no form and no tracking scripts. Tick the platforms and we'll prepare a ready-to-send email to kontakt@mbox.ulewicz.space.

I'm interested in:
Write to us

We'll use your address only to tell you about the launch.

About the apps

Can I install mbox right now?

Yes. Go to mbox.ulewicz.space/app and install it from your browser (the install icon in the address bar, or Add to Home Screen in Safari). You get your own window, an icon and push notifications. It’s the web version in an app wrapper, not yet a native app.

When will the apps arrive?

The plan is Phase 1, between Q4 2026 and Q2 2027, in this order: IMAP/SMTP, desktop, mobile. These are estimates for a small team, so we'll only give a concrete date at beta.

Can I use Thunderbird or Outlook right now?

For sending: partly. App passwords for SMTP are already in the Security center. Receiving through IMAP is the first item of work and will land before the apps, with autoconfiguration. Accounts with 2FA will work normally.

Will the app have AI and open tracking?

Yes. The apps share code with the web version, so you get the same features. IMAP/SMTP clients won't get AI, sequences or meeting links, because those are mbox features.

Will encrypted messages be visible in other programs?

The client itself handles OpenPGP messages (Thunderbird, for example). Zero-access mail will only be decrypted by mbox Bridge, planned for Phase 2.

Will the apps cost extra?

We don't plan a separate fee for the apps: you sign in with the same account and plan. You subscribe on the website, because in-app purchases on mobile carry store commissions.

Get an inbox that finally works for you.

Two minutes, no credit card. You get a @mbox.ulewicz.space address, 15 GB and an AI that starts helping from your first email.

@mbox.ulewicz.space

 

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