Migration
How to Migrate Business Email
Inventory mailboxes, copy messages, change MX records and verify delivery before closing the old account.
An email migration needs both historical message copying and a delivery cutover. Changing MX records alone does not move old mail, aliases, contacts or device settings. Plan the transition around how the business uses its mailboxes.
Practical steps
- Inventory mailboxes, aliases, forwarding rules, shared access and storage use. Identify local-only messages and any calendar or contact data requiring a separate export.
- Create destination accounts and obtain a confirmed migration method. Keep backups and arrange secure access; do not send a spreadsheet of passwords through an unprotected channel.
- Perform an initial message copy and compare folders and counts. Prepare MX and authentication changes while retaining the old service for messages still arriving there.
- Switch the intended DNS records, update clients and perform a final sync as appropriate. Monitor both systems until cached delivery routes have settled.
Check the result
Test inbound and outbound mail, aliases and forwarding. Compare older messages and attachments as well as new delivery, and confirm users can find their Sent folders.
Before you proceed
IMAP copying does not necessarily migrate contacts, calendars, filtering rules or local archives. Agree the exact scope and any downtime or fees before starting.