Your email, at your provider. Not at everyone's.
elstir was born managing business email in 2003. Today we still operate sovereign email platforms for organisations that demand to keep their communication under their own control.
Private business email, on our infrastructure.
For most businesses, Microsoft 365 is the right answer — and we implement it every week. But some organisations need something else: business email on a platform of their own, hosted in our Barcelona data centre, where they know exactly where their mailboxes are and who administers them.
We have been operating email platforms since 2003 — we started with Lotus Notes and Domino when the internet was barely reaching businesses — and today we still manage independent email systems for clients who value that sovereignty.
And if what you're after is armouring your domain against spoofing and fraud, we have a dedicated service covering both models — the private platform and Microsoft 365 — with SPF, DKIM and DMARC: managed email security →
Everything serious email needs.
Mailboxes in our own data centre
Your mailboxes on our servers in Barcelona, on our own internet network (AS49008).
Total privacy
No content analysis by third parties. Your email is yours, and it stays here.
Professional anti-spam
Filtering tuned with premium paid reputation lists — not the free public ones — and our own rules against specific campaigns.
A dedicated, separate server
Email lives on its own server, isolated from web hosting: better IP reputation and zero interference.
Deliverability, looked after
A dedicated server with a good-reputation IP and blocklist monitoring: email goes out and arrives. And if something threatens the reputation, we detect it before it affects you.
Migrations
We bring you over from any platform without losing a single message. Or to M365 if one day you prefer it.
Shall we talk about your infrastructure?
An initial audit with no obligation. Tailored solutions, with a single point of contact who knows your business.