Mail-in-a-Box
Open source from Free. Based in United States.
Last checked 25 October 2026
I don't star-rate self-hosted software, because the cost and privacy depend on where you run it.
Key facts
- Cheapest plan
- Open source
Free - Free plan
- Yes, open source
- Storage
- Not confirmed
- Your own domain
- ✓ Yes
- End-to-end encryption
- No
- Company based in
- United States
- Your data is kept in
- Your own server
- Founded
- 2013
- Free trial
- Free to download
- Funded by advertising
- No
- Works in any mail app
- ✓ IMAP and SMTP
- Calendar and contacts
- ✓ Yes
- Aliases
- Yes
- Open-source apps
- ✓ Yes
- Sign up without ID
- No
- White label
- No
- Reader offer
- None
Not rated: self-hosted software
Not sure what something means? See my email glossary.
Plans
1 plan
Prices as listed when I checked, before any tax. Dollar and euro prices are what the provider charges.
Reviews
Nothing yet
I haven't added ratings from other sites for Mail-in-a-Box yet. Tell me where to look
These are other people's ratings, taken from each site on the date shown. They don't change my stars, which come only from the facts.
From members
No member reviews of Mail-in-a-Box yet. If you've used it, yours could be the first.
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Features
Not checked yet
- Your own domain✓ Yes
- Works in any mail app (IMAP)✓ Yes
- Calendar and contacts✓ Yes
- Open source✓ Yes
- White label (resell as your own)No
- Two-step sign-inUnknown Suggest an edit
- PasskeysUnknown Suggest an edit
- PGP encryptionUnknown Suggest an edit
- Password-protected email to anyoneUnknown Suggest an edit
- Catch-all addressUnknown Suggest an edit
- Filters and rulesUnknown Suggest an edit
- Sieve filtersUnknown Suggest an edit
- Auto-replyUnknown Suggest an edit
- Scheduled sendUnknown Suggest an edit
- Undo sendUnknown Suggest an edit
- Import from another providerUnknown Suggest an edit
- Mobile appsUnknown Suggest an edit
- Desktop appUnknown Suggest an edit
- POP3Unknown Suggest an edit
- CalDAV and CardDAV syncUnknown Suggest an edit
- JMAPUnknown Suggest an edit
- Tor (onion) addressUnknown Suggest an edit
- Pay with cash or cryptoUnknown Suggest an edit
- Export all your mailUnknown Suggest an edit
- APIUnknown Suggest an edit
- AI featuresUnknown Suggest an edit
- Single sign-on (SSO)Unknown Suggest an edit
Policies and contacts
0 of 5 found
- Privacy policy
- Unknown Suggest an edit
- Acceptable use policy
- Unknown Suggest an edit
- Terms of service
- Unknown Suggest an edit
- Report abuse
- Unknown Suggest an edit
- Contact
- Unknown Suggest an edit
Track record
Code and releases
- Their code
- mail-in-a-box/mailinabox ↗ CC0-1.0 licence · 15,448 stars · latest release v77 on 26 September 2026 · last change 22 October 2026
From public sources, last read on 31 October 2026: incidents as the provider reports them. None of this changes my stars.
Company and servers
Founded, owner, servers, uptime and blocklists
- Founded
- 2013
- Domain first registered
- 2014 (mailinabox.email)
- Website hosted in
- United Kingdom (Team Blue Carrier Limited)
Only the website. Where your mail is kept is under Your data is kept in. - Name servers run by
- Gandi
- DNSSEC
- ✓ Signed
- IPv6
- Not yet
- Website certificate
- Let's Encrypt · TLS 1.3
- Home page answered in
- 385 ms · HTTPS with HSTS
My automatic checks last ran on 31 October 2026. Server countries come from their IP addresses (IP geolocation by DB-IP), and big providers often run servers in many countries. Blocklists are the free lists that answer public look-ups.
Mail-in-a-Box home page
Screenshot
News
Latest headlines
- Loading the latest news…
All Mail-in-a-Box news · News by RSS
From Mail-in-a-Box's own blog and social accounts, and from tech and security news sites. I show the headline and its first few lines, and link to the full story where it was published.
Price history
No price yet
I haven't confirmed a price yet.
Sources
1 source
Suggest an edit
Spotted something wrong, out of date or missing about Mail-in-a-Box? Members can send me a correction, ideally with a link to the provider's own page. I check every one before anything changes.
Facts are checked against Mail-in-a-Box's own pages and dated. Offer links are referral links: I may earn a commission, and it never changes the stars or the order. How I make money