Register No. 055
Is mailbox.org European?
Yes. mailbox.org is under verified European control.
Latest
Nothing new on file since the check on 4 September 2026. Seen news about mailbox.org? Send it with a source.
- Controlled by
- Heinlein Support GmbH / Heinlein Group
- Control sits in
- Germany
- Seat
Germany- Last checked
About mailbox.org
mailbox is a German email provider with webmail, a calendar over CalDAV and contacts over CardDAV. It also includes a video call feature, so small teams can meet without a separate tool. The larger plans let you use your own domain and give you more storage.
Evidence 3
- Current legal noticemailbox.org ↗
- 100% subsidiary announcementmailbox.org ↗
- Heinlein Group managementheinlein.group ↗
Sources were opened and read on the date of the check. Registers and websites change; if one of these no longer says what we cite it for, tell us.
Product
mailbox.org
mailbox.org ↗German email provider on carbon neutral servers
mailbox is operated by Heinlein Hosting GmbH, a wholly owned subsidiary of Heinlein Support GmbH. The wider Heinlein Group has four brands and more than 150 employees. The service runs on dedicated servers in two separate locations in Germany, and the Berlin data centres and offices use electricity from renewable sources.
- Instead of
- Gmail and Zoom
- Pricing
- Three plans are available: Light at 1 euro per month, Standard at 3 euro per month and Premium at 9 euro per month, with more features and storage as you move up.
- Suits
- Teams that want German email and calendars
Operations
Who runs the parts of the service we could observe from outside, checked 4 September 2026. A provider's control can differ from where its servers stand.
| Part | Provider | Provider control | What we saw |
|---|---|---|---|
| Public website | Heinlein Group | European | A 185.97.174.35 · AS199118 [1] [2] |
| Incoming email | mailbox.org | European | MX 10 mx1.mailbox.org · 10 mx2.mailbox.org · 10 mx3.mailbox.org · 10 mx4.mailbox.org · 50 mx-n.mailbox.org [1] |
| Outgoing email | Direct or undisclosed mail senders | Unknown | SPF v=spf1 ip4:213.203.238.0/25 ip4:195.10.208.0/24 ip4:91.198.250.0/24 ip4:80.241.56.0/21 ip6:2001:67c:2050::/48 mx ~all [1] |
Badge
mailbox.org can show its verified European ownership with a badge that links back to this page. If the verdict ever changes, the badge stops working.
Also available in black and white, and as a compact badge: change blue to black or white, or ownership to ownership-compact.