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Email with AI · encrypted · EU-hosted

NewNew: rules, Screener, calendar, aliases and 10 more features

Email that understands.

AI that reads between the lines. Encryption that doesn't read at all.

A free inbox with thread summaries, reminders and read receipts. No ads, and we never sell your data.

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Free @mbox.ulewicz.space address · no credit card

  • 15 GBfree, to start
  • 0ads, 0 data sold
  • EUservers in Falkenstein
  • E2EOpenPGP between users

Who it's for

For people who live in email.

  • Freelancers

    Send later, follow-ups you don't have to remember, and a custom domain included.

  • Agencies

    Shared inboxes, team templates and one brand voice.

  • Sales teams

    Sequences, click tracking and booking links in one tool.

  • Law firms and advisors

    End-to-end encryption, EU hosting and an audit log.

  • Founders

    A morning brief and a Copilot that remembers what you agreed.

These are the segments we build mbox for, not customer logos. We'll add testimonials once we have them.

Most email is noise. mbox summarises it for you, keeps track of your promises and encrypts what should stay between you. The rest is your free afternoon.

Three promises

Understands. Remembers. Protects.

01

Understands

AI reads threads for you: it summarises them, sets priorities, suggests replies and answers questions about your mail.

  • Summaries
  • Copilot
  • Drafts
02

Remembers

You wrote “I'll send it Friday”? Your inbox remembers. Reminders, follow-ups, sequences and commitment detection.

  • Reminders
  • Follow-ups
  • Sequences
03

Protects

End-to-end OpenPGP encryption, password-protected email to anyone, zero-access mode and servers in the EU.

  • E2E
  • Zero-access
  • EU hosting

Connect your mailboxes

Keep your Gmail. mbox adds the rest.

Connect Gmail, Outlook, iCloud, Yahoo, WP, Onet, Interia, o2 or any IMAP account. Read and send from them inside mbox, with the AI, tracking and follow-ups they don't have.

  • One unified inboxAll your accounts in one view, each in its own colour.
  • Two-way syncRead, starred and archived stay in step on both sides.
  • Safe sign-inOAuth for Google and Microsoft, app passwords for the rest.
  • mbox superpowers on every accountSummaries, tracking, reminders and sequences work on mailboxes that aren't even yours at heart.
connected mailboxes on the plan1Free2Domain5Pro

Product tour

A whole day in one inbox.

Seven steps, from the first email in the morning to an encrypted reply in the evening. Scroll along or click a number.

mbox.ulewicz.space/app

An mbox inbox: five emails with one-line AI summaries and priority bars.

A thread with a TL;DR summary, fact chips (amount, deadline, link, person), a next step and a draft reply.

Catch-up mode: one message card with a summary, a reason and a suggested action, with Reply, Archive, Remind and Schedule buttons below.

The Mission Control dashboard: focus score 82, an inbox-zero ring, waiting lists, a day plan with meetings and a live open.

A sent email with a counter: opened 3 times, a timeline of opens and clicks with a flagged proxy open, per-recipient stats and a live notification.

A sequence diagram: three steps, a reply from Anna stops the sequence and the remaining steps are skipped.

A message: plain text in the sender's browser turns into OpenPGP ciphertext and becomes readable again at Anna's end. SPF, DKIM and DMARC badges.

Keep scrolling for the next steps

  1. 1 / 07 Free

    An inbox that sorts itself by priority.

    New mail lands in Focus, Other, Updates or Newsletters. Each message gets a priority and a one-line summary, so you see what matters before you open anything.

    • Categories and a 0–100 priority
    • One-line AI summaries
    • Plain-language search and keyboard shortcuts

  2. 2 / 07 Free

    A thread in one sentence, facts included.

    The AI pulls amounts, deadlines, links and people out of the thread and finishes with the next step. When you want to reply, a draft is already waiting.

    • Fact chips: amount, deadline, link, person
    • Thread timeline and next step
    • A draft reply in the tone you pick

  3. 3 / 07 Free

    Your inbox as a deck of cards.

    Catch-up mode shows one message at a time: a summary, why it's in front of you and a suggested action. Press a key and the next card slides in.

    • Reply, archive, snooze or schedule a meeting
    • R, E, H, M shortcuts instead of clicking
    • Unsubscribe from a newsletter in one move

  4. 4 / 07 Free

    A dashboard that says what really matters.

    A focus score, an inbox-zero ring, “waiting on you” and “waiting on them” lists, your day plan and live opens. One window instead of five tabs.

    • Focus score and an inbox-zero streak
    • Who's waiting on you, who you wait on
    • Meetings, reminders and live tracking

  5. 5 / 07 Free → Pro

    Know when Anna opened your email.

    How many times, on what and when, for each recipient separately. Opens through a proxy, such as in Apple Mail, are flagged so the numbers don't lie.

    • A timeline of opens and link clicks
    • A notification the moment it's opened
    • Honest numbers: proxy opens are flagged

  6. 6 / 07 Pro

    A series of emails that stops itself.

    Schedule a first email and two follow-ups. When someone replies, the sequence ends on its own, with no awkward “just following up for the third time”.

    • Spacing and weekday send windows
    • Variables: first name, company
    • Live reply statistics

  7. 7 / 07 Free

    Encrypted before it leaves your browser.

    The content turns into ciphertext on your device. Only you and the recipient can read it, and to someone without mbox you can send a password-protected email.

    • OpenPGP end-to-end
    • Password emails to anyone
    • Zero-access for incoming mail

AI in your inbox

Read less. Do more.

mbox reads the thread before you do, and tells you straight: one sentence, a few bullets, the next step.

  • Thread summaries

    A long thread in one sentence, with a to-do list attached.

  • Daily brief

    What's urgent, what you're waiting on, what can wait. One page, once a day.

  • Writing and tone

    Shorten, expand, fix, translate. Formal, warm or to the point.

  • Smart replies

    Three ready-made replies, one click away.

  • Search in plain language

    Type “invoices from Marek in September”. We handle the operators.

  • Inbox Copilot

    Ask what you agreed with a client. The answer comes with citations to the emails.

  • Commitment detection

    Write “I'll send it Friday” and mbox remembers, with a draft ready.

Everything about AI in mbox

New

Fourteen new things in your inbox.

Rules, Screener, calendar, aliases, Paper Trail and more. All inside now, on the Free plan wherever we can.

  • New

    Rules and filters

    If X, then Y: label, archive, star. Set it once and it runs itself.

  • New

    Screener

    New senders wait in a lobby until you decide to let them in.

  • New

    Out-of-office with AI

    On leave? AI writes the reply in your tone and your dates.

  • New

    Pin and set aside

    Pin what matters, set the rest aside, reply later.

  • New

    Masked aliases

    A disposable address that forwards mail to you. Switch it off with one click.

  • New

    Notes and tasks

    Turn a thread into a task or a note without leaving your inbox.

  • New

    Calendar with RSVP

    Accept or decline an invite in one click.

  • New

    Paper Trail

    Receipts, orders, parcels and invoices organise themselves.

  • New

    Import and export

    Bring your mail from Gmail or Outlook over IMAP. A full export is always at hand.

  • New

    Push and PWA app

    Install mbox like an app and get notifications.

  • New

    AI+

    Translate, Instant Intro, tone check, auto-labels, auto-drafts and dictation.

  • New

    People and mini-CRM

    Contact history and “keep in touch” reminders.

  • New

    Team workspaces

    Shared inboxes, assignments and internal comments.

  • New

    Security center

    App passwords (SMTP), login alerts and an audit log.

  • See all features

Try it

See it work before you sign up.

Four live mini-demos. Summarise a thread, rewrite a note, watch opens roll in and encrypt a message with real AES-256-GCM, all without leaving this page.

Pick a sample email

From Anna Kowalska <anna@firma.pl>

Subject Implementation quote — by Friday?

Text to summarise (paste your own if you like)

Press Summarise and you'll get one sentence, the facts it caught and the next step.

Runs locally in your browser. The scenarios are scripted and nothing is sent to a server.

Numbers we'll put our name to

  • 15 GBof storage on the Free plan
  • 0ads, trackers and data sold
  • 310000PBKDF2 iterations guard a password email
  • 100free AI actions every month

Productivity

Send when it suits. Follow up when it matters.

The tools of pro-grade email apps, in an inbox that's on your side.

Write once. Send at the right moment.

Schedule delivery, set a reminder in case nobody replies, and know you can always undo.

Sequences that stop themselves.

A series of emails spaced over days. The moment someone replies, the sequence ends.

Meeting times in one click.

Drop free slots into an email or share a booking link. Both sides get an ICS invite.

Book30 min · UTC+1
  • Templateswith variables like name and company
  • Snoozethe email returns when you need it
  • Undo sendwithin a window you choose
  • Auto follow-upssent for you when nobody replies
  • Share a conversationvia link, with an expiry date

A day with mbox

From eight to six.

This is an ordinary day when your inbox does part of the work for you.

  1. 08:00
    Morning brief

    You know where to start

    Two urgent items, four to answer, one meeting. One page instead of forty threads.

  2. 09:30
    Catch-up

    Twelve cards, six minutes

    Your inbox as a deck of cards: archive, snooze or reply with a draft. One decision at a time.

  3. 11:00
    Send later

    Write now, it leaves tomorrow at 8:30

    Plus a reminder if the client hasn't replied in three days. No sticky notes on your monitor.

  4. 13:15
    Tracking

    Anna opened the offer

    Live notification: third open and a click on the pricing link. You call while the topic is hot.

  5. 15:00
    Meeting times

    A link instead of five emails

    Free slots in the message body or a booking page. The ICS invite goes to both sides.

  6. 16:40
    Commitment

    “I'll get back to you Friday”

    Written in an email, remembered by mbox. Friday morning a reminder and a draft are waiting.

  7. 18:00
    Weekly report

    What worked, what's hanging

    A short Friday-evening recap: replies, opens, meetings and loose ends.

Read receipts

Know who read it.

How many times, who, on what and when. Plus link clicks and live notifications, not another report on Monday.

  • How often and who. An open timeline for every recipient.
  • On what. Email client, device and country.
  • Clicks. See which link caught their eye.
  • Live. A notification the moment it's opened.

Let's be honest: this is sender-side analytics. The tracking pixel only fires when the recipient loads images, and some clients (Apple Mail, for one) open mail through a proxy. We flag those opens so you don't celebrate too early. You can turn tracking off for any message, and your own opens never count. Remember your GDPR duty to inform recipients.

Privacy

Encryption that doesn't read at all.

Your mail isn't our raw material. Keys are created in your browser and the servers sit in the European Union.

End-to-end

OpenPGP between mbox users.

Password emails

To anyone, no account needed.

Zero-access

Incoming mail encrypted to your key.

2FA

TOTP codes and recovery codes.

SPF · DKIM · DMARC

Verification plus a phishing shield.

EU servers

Hetzner, Falkenstein. No ads.

How the encryption works, exactly

Trust without marketing slogans

  • Hetzner · Falkenstein, DE
  • GDPR
  • OpenPGP
  • AES-256-GCM
  • PBKDF2 · 310,000
  • TLS + DKIM
  • No ads
  • No AI training
Security details

Under the hood

For developers, files and order.

  • API, webhooks and MCP

    API tokens, webhooks and an MCP server. Your AI agent, Claude for example, uses your mail only as far as you allow.

  • Large files up to 2 GB

    Send them as a link with a password and an expiry date. See who opened and downloaded.

  • Wallet and Paper Trail

    Receipts, orders, parcels and invoices organise themselves in one place.

  • Subscriptions manager

    Recurring payments found in your mail, gathered in a single list.

  • Desktop clients

    App passwords and SMTP: Thunderbird, Outlook and Apple Mail send through mbox. Receiving over IMAP is coming soon.

For teams

One inbox for the whole company.

Custom domains, shared inboxes and an admin console. Grow from one person to a whole team without switching tools.

Pro · Business

Custom domains

Addresses on your own domain, with DNS records ready to copy. 3 in Pro, unlimited in Business.

Business

Workspace and admin console

Users, roles and company settings in one place.

Business

Shared inboxes

support@, sales@, hello@ — handled together, no more forwarding.

Business

Team templates

One brand voice in every email.

Business

Audit log

Who changed what in your company settings, and when.

Business · coming soon

SSO (SAML) and DLP

Company sign-in and protection against data leaks.

Everything about mbox Business

What's next

We're just getting started.

The roadmap is public, including what isn't built yet.

  • Coming soon

    IMAP and SMTP

    Thunderbird, Outlook and Apple Mail work with mbox.

    Phase 1 · Q4 2026 – Q2 2027

  • Coming soon

    Desktop apps

    Windows, macOS and Linux. Offline mode, tray, notifications.

    Phase 1 · Q4 2026 – Q2 2027

  • Coming soon

    Mobile apps

    iOS and Android, with push that carries no message content.

    Phase 1 · Q4 2026 – Q2 2027

  • Coming soon

    Calendar

    Real calendar sync instead of availability alone.

    Phase 2 · Q3 2027 – Q1 2028

  • Coming soon

    CRM

    HubSpot, Pipedrive and Salesforce connected to threads.

    Phase 2 · Q3 2027 – Q1 2028

  • Coming soon

    SSO, SCIM and DLP

    Company sign-in and protection against data leaks.

    Phase 3 · Q2 2028 – Q1 2029

See the full roadmap

Apps

Apps for every platform.

For now mbox runs in any modern browser. Native apps are on the way.

Apps: status and plan
  • WindowsComing soon
  • macOSComing soon
  • LinuxComing soon
  • iOS and AndroidComing soon

Comparison

mbox versus typical free email.

FeaturemboxTypical free email
Thread summaries and AI CopilotYesPaid add-on
Ads and profilingNoneUsually
End-to-end encryptionYesNo
Password-protected email to anyoneYesNo
Read receipts and link clicksYesPlugin or none
Send later, undo, remindersYesPartly
Sequences and commitment detectionYesNo
EU serversYesVaries
AI trained on your mailNeverDepends on settings

This comparison is a generalisation: individual services differ and change their offering.

Full comparison: Gmail, Outlook, Proton, Polymail, Superhuman

Pricing at a glance

From $0. Your own domain from $2.90.

Six plans, one rule: you pay for what you use. Two months free when billed yearly.

See full pricing

FAQ

Questions people ask most.

Is mbox really free?

Yes. The Free plan gives you 15 GB, a @mbox.ulewicz.space address, 100 AI actions and 50 tracked emails a month, with no card and no ads. Paid plans add limits and features for heavy users and teams.

Can I connect my existing mailboxes?

Yes. Connect Gmail, Outlook, iCloud, Yahoo, WP, Onet, Interia, o2 or any IMAP account (Free: 1 mailbox, Domain: 2, Pro: 5). Read and send from them inside mbox, with AI, tracking and follow-ups.

Does the AI read my email?

Only when you ask it to, or when you switch on automatic triage of new messages. The model (Claude by Anthropic) does not learn from your email, and you can turn AI off with a single switch in settings.

What's the difference between end-to-end and zero-access?

End-to-end encrypts a message between users, so only the sender and recipient can read it. Zero-access encrypts every incoming email to your public key the moment it arrives. Both have a cost: the AI can't see encrypted content.

Can I send an encrypted email to someone without mbox?

Yes. Set a password and the recipient gets a link and decrypts the message in their browser (AES-256-GCM). Share the password over another channel; we never learn it.

Is open tracking fair to recipients?

It's sender-side analytics. You can switch it off for any message, and in Europe you should inform recipients as GDPR requires. We flag opens through proxies (Apple Mail, for instance) so the numbers don't lie.

Can I use my own domain?

Yes. Pro supports 3 domains, Business unlimited. You get ready-to-copy DNS records and one-click verification.

Where is my data stored?

In Germany, on Hetzner servers in Falkenstein. TLS protects data in transit and outgoing mail is signed with DKIM.

Can I move my mail over from Gmail or Outlook?

Yes. You import mail over IMAP and can run a full export any time. We don't lock you in.

Does mbox work like an app?

Yes. You can install it from your browser as a PWA and get push notifications. Native desktop and mobile apps are on the way.

When will the Windows, macOS, Linux and mobile apps arrive?

We're building them and will announce the launch here. Until then mbox works in any modern browser, phones included.

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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