Change email without improvising.
A migration touches domains, DNS, identities, data, clients and devices. The changeover is designed before the first data is moved.
MrMail can assess Zimbra, IMAP, Microsoft 365 or Exchange and other hosted-email sources. The method depends on the source, volumes, data types and available operating window.
Migration journey
From inventory to validation.
1. Inventory
Record domains, mailboxes, aliases, groups, volumes, dependencies and responsible people.
2. Data types
Separate messages, folders, calendars, contacts, tasks, shares and anything that will not transfer automatically.
3. Domain and DNS
Prepare MX, SPF, DKIM, DMARC and other relevant records without assuming their current state.
4. Clients and devices
Identify browsers, Outlook, Thunderbird, mobile devices, protocols and synchronisation features actually in use.
5. Pilot
Test method, compatibility and results with a representative scope where the project permits.
6. Cutover
Agree the window, responsibilities, communication and a fallback appropriate to the risk.
7. Verification
Check delivery, sign-in, data, calendars, contacts, sharing and devices after the change.
8. Follow-up
Resolve observed gaps and hand over an environment with a understood support boundary.
No method universally guarantees a zero-loss migration. Source, format and tool limitations are explained before cutover.
Control points
What a controlled change looks like.
Understand first
Beyond mailboxes, the inventory covers aliases, groups, calendars, contacts, tasks, shares, archives, forwarding and identity sources. Not every source exposes each object in the same way.
A data list states what will transfer, be rebuilt or be consciously excluded.Control cutover
DNS changes, final synchronisation, user communication and client reconfiguration must align. An appropriate fallback is considered for critical dependencies.
A pilot reduces uncertainty but does not replace checking the full scope.Verify afterwards
After changeover, delivery, sign-in, representative data, sharing and devices are checked. Observed gaps are documented and routed through the agreed support path.
Acceptance concerns verified outcomes, not merely a migration tool that completed.Tools accelerate individual tasks; they do not replace planning, verification or ownership.
Support begins with an understandable boundary.
During migration, a defined contact is needed for decisions and questions. MrMail agrees the method and communication with responsible people so users are not left with unexplained changes.
After cutover, migration follow-up, ongoing platform operation and issues in customer devices, networks or third-party software are distinguished. That boundary prevents expectations first appearing during an incident.
Support channels, hours, response model and additional work follow the actual agreement. The site therefore provides no universal SLA or blanket zero-downtime promise.
The move is complete when delivery and working practices are verified—not when copying ends.
Transition questions
Can migration be phased?
Often, but domain routing, coexistence and data flows must be assessed for the specific case.
Is there a rollback?
Fallback thinking is part of planning; its exact form depends on the source and the point in the changeover.
What does post-migration support cover?
Channels, hours, response model and responsibilities follow the support agreement, not a blanket website promise.
Prepare the change before fixing the date.
Tell us the current system, users, data and preferred operating window.