Is mailbox.org EU-sovereign?

Curator's note

Run by Heinlein Hosting GmbH in Berlin.

How staysin.eu classifies mailbox.org

A provider counts as EU only when all three criteria hold:

1. Country: the operating company is based in the EU. mailbox.org is operated from Germany (EU).
2. Holding: no non-EU parent or holding company. mailbox.org has no non-EU parent.
3. Own infrastructure: it runs its own stack rather than reselling a non-EU service. mailbox.org runs its own infrastructure.

Where a server physically sits is shown on each check but does not change the verdict: legal reach follows who controls the processing, not where the bytes are. Read the methodology.

How often staysin.eu sees mailbox.org

Seen on 110 of 10871 checked domains (latest check per domain, as of 25 October 2026): as mail (MX) on 100, as mail sending (SPF) on 10, as third-party requests on 6.

Domains are those people chose to check on staysin.eu, not a representative sample of the web.

Recently checked domains using mailbox.org:

• shipit.lt
• european-alternatives.eu
• pricing.ayedo.de
• pics.computerbase.de
• greenbone.de
• linuxgoose.com
• arztkonsultation.de
• mundialis.de
• klarvus.de
• status.kimai.cloud

Check which providers a domain uses · All classified providers