Hard questions. Honest answers.

FlowOne environments range from a single server to full high availability (HA) — you choose the architecture. Managed HA environments run a primary, a live mirror and an independent witness server, with automatic failover whenever it is needed.

Measured, not estimated: a full automatic failover completes in 4–6 minutes in live drills, and replication lag on the HA path is capped at 30 seconds. Every cluster carries a printable SLA evidence report — the full numbers and their context live on the Trust page.

Write authority is a witness-issued epoch: only the node holding the current epoch may accept writes, so two active writers cannot coexist. The full mechanism is documented on the For Geeks page.

By deliberately breaking it. We run controlled failover drills, measure takeover time, verify that no overlapping writer exists, and record the results. Recovery is proven, not assumed.

We do not just take backups — we also run automated restore drills. This guarantees that backups not only exist but can actually be restored.

The system creates encrypted backups that also go through automatically verified restore drills. A complete system or a single mailbox can both be restored.

The mailbox can be restored from backup, and every operation is recorded in the audit log.

Backups are encrypted, stored on a separate server, verified regularly, and their restoration is tested in an automated way.

We do not rely on theoretical estimates — we run recovery drills regularly. We know exactly which steps a full rebuild consists of.

There is no need to. The system automatically verifies backup health and regularly runs restore drills.

Yes. The system is cluster-based. Instead of endlessly growing a single server, we add new clusters and distribute users among them intelligently.

The Fleet Manager continuously monitors cluster load. New mailboxes are automatically placed on the cluster that has the right capacity.

Yes. We built the Mailbox Migration Engine, which can move a complete mailbox from one cluster to another while the system automatically redirects the user to the new location.

The platform is cluster-based. New clusters can be added to the system, the Fleet distributes new mailboxes intelligently, and existing users can be moved with live migration when needed. Users notice none of this.

FlowOne was never designed for a single server. The platform is built from clusters that scale independently of each other. New clusters can be added in minutes, the system places new mailboxes intelligently, and moves existing ones with live migration when needed. Users notice none of it: they keep working with the same login while the system automatically manages growth in the background. That is what allows the platform to serve tens of thousands of users in the long run.

The platform is designed so that a complete new mail infrastructure can be created quickly, with minimal manual configuration.

The system applies multiple layers of protection: SPF, DKIM, DMARC, TLS, phishing detection, intelligent link inspection, encrypted backups, incident response, audit logs and high availability.

Every server goes through hardening. Only key-based SSH access is allowed, a firewall protects the services, and Fail2Ban plus continuous security checks are running.

The system has an incident response center. A server can be isolated, a forensic snapshot can be taken, and then the service can be safely restored.

The platform continuously monitors configuration drift, security events and infrastructure health. Anomalies show up immediately on the Platform Status and Incident Center screens.

With traditional email, yes — the same as with Microsoft Exchange or Microsoft 365. The upcoming Secure Conversations feature, however, provides end-to-end encrypted communication where even the server cannot read message contents.

The system continuously monitors certificate status and provides automatic renewal as well as alerting.

The Platform Status page shows the health of the entire infrastructure on a single screen: high availability, security, backups, certificates, recovery drills and system checks.

The system is built for automation. It provides continuous self-checks, configuration validation, incident handling, automatic backups and detailed operations runbooks.

The goal was for a small operations team to be able to run enterprise-grade infrastructure. That is why nearly every check, backup and validation is automated.

Through an automated provisioning process. A new server can be installed in a few minutes; it gets hardened, sets up certificates and joins Fleet supervision.

Every new version goes through automated tests, live failover drills and validation checks before it reaches production.

Every update passes automated tests, then goes live in a controlled way. The system continuously verifies that every component runs the same version.

The Fleet continuously monitors configuration drift. If a deviation occurs it is flagged, and the expected state can be restored when needed.

Automated validation runs before and after every update. If a problem appears, it is visible immediately, and a documented rollback process is available.

We have written more than 1,000 automated tests covering high availability, replication, backups, restore, migrations, routing, security and the operation of the entire infrastructure. On top of that, we regularly run live failover and disaster-recovery drills.

Microsoft 365 is an excellent service. FlowOne is built for organizations that want their own infrastructure, full data control, customizability, predictable costs and enterprise-grade availability.

We are not selling a mail server — we are selling a complete operations platform. High availability, automated backups, recovery drills, intelligent monitoring, live migration and central supervision together are what create the real value.

We are not asking for blind trust — we show how the system is built. The platform continuously checks itself, automatically detects deviations, regularly performs recovery drills, supports live migration, and is designed to keep working even when critical components fail. We built reliability on automation, testing and continuous validation — not on promises.

Because the organization does not just get an email system — it gets a platform designed to serve it safely, predictably and scalably for years. Our goal was never for it to simply work — it was for it to keep working even when something fails.