European infrastructure
Cold-email inboxes that can be genuinely European.
Mailionaire is built and run in Switzerland. Turn on EU/Swiss residency and your Microsoft 365 mailboxes run on EU/CH IP space — something no other Microsoft 365 cold-email provider offers. We are equally careful to describe what that does and does not mean.
What "European" means here
- Mailionaire is built and run in Switzerland.
- With EU/Swiss residency on, your mailboxes use EU/CH IP space and content sits at rest in the EU/Switzerland under the Microsoft EU Data Boundary.
- To our knowledge, no other Microsoft 365 cold-email provider offers licensed Microsoft 365 on EU/CH IPs.
- Residency is an optional toggle. For recipients in the US, US IP space usually delivers better, so you choose per setup.
Why it can help
Data residency. If your own policies, or your clients', require mailbox data to be stored in Europe, EU/Swiss residency makes that straightforward.
Deliverability to European recipients. Sending to European inboxes from European IP space can be a better regional match than sending from US infrastructure. We describe this as a sensible choice for European audiences, not a guaranteed inbox boost — and for US audiences, we would point you to US IPs.
The honest part
What European infrastructure does not do
We will not tell you that EU IPs make your cold email legal. They do not. This is the single most over-sold claim in our category, and we would rather lose the sale than mislead you.
- Residency is about storage and sending location — not consent.
- Consent law still applies. Germany's UWG §7(2), for instance, generally requires prior opt-in for advertising email, including B2B.
- GDPR legitimate interest can cover the processing of contact data; it does not, by itself, authorise the act of sending in markets that require consent.
- You are responsible for sending in line with the law of each country you contact.
We give you compliant infrastructure and accurate language. The decision to send, and to whom, stays with you.
The safe claim, in our words
Mailbox content at rest in the EU/Switzerland under the Microsoft EU Data Boundary, on EU/CH IPs.
We deliberately do not claim that "no data ever leaves the EU" — limited, pseudonymised egress can exist in any global service, and we would rather be precise than absolute. If a claim sounds too clean to be true, it usually is.
Want the longer explainer? Read EU data residency for cold email: what it means (and what it doesn't).
FAQ
European infrastructure questions
What does 'European email infrastructure' actually mean here?
Mailionaire is built and run in Switzerland. With EU/Swiss residency switched on, your mailboxes use EU/CH IP space and mailbox content sits at rest in the EU/Switzerland under the Microsoft EU Data Boundary. Residency is optional, because US IP space usually delivers better for US recipients.
Does sending from EU IPs make my cold email legal?
No. Where you send from is separate from whether you are allowed to send. Consent rules apply regardless of IP. You remain responsible for the law of each market you contact.
Is cold email legal in Germany?
German law (UWG §7(2)) generally requires prior opt-in for advertising email, including business-to-business. Infrastructure cannot grant that permission. Treat each market on its own rules.
Why send from EU IPs at all then?
Two honest reasons: data residency (where mailbox content is stored) and deliverability to European recipients, where a regional match can help inbox placement. Neither is a legal permission to send.
European inboxes, described honestly
Start with one domain — switch on EU/Swiss residency if you need it.