Quick answer
IMAP usually fits a mailbox used on several devices because it synchronizes server folders. POP is a different download-oriented workflow and can remove server messages depending on the client settings. Decide how messages will be retained and backed up before choosing.
Before you start
Check the mailbox's current configuration, number of devices, storage capacity, and any existing local-only archives. Changing a client account type can affect access to old downloaded messages.
What to do
- Inventory where existing messages are stored and back up local archives before changing an account configuration.
- For synchronized access, configure a new secure IMAP connection using the account's current settings.
- If POP is required, deliberately choose retention behavior and understand whether other devices will still see messages on the server.
- Test incoming, outgoing, Sent-folder behavior, and message deletion on the intended devices before removing the previous setup.
Check the result
Confirm that old messages remain accessible and that expected folder changes appear on each device. A successful first download does not prove that the retention policy is correct.
If something does not work
If messages disappeared after a POP setup, stop further changes and inspect client retention and local archives. Do not delete and recreate the mailbox while trying to repair a device configuration.
Related help
- Find the correct secure IMAP and SMTP settings for your mailbox
- Set local or remote email routing for the correct mail provider
- Collect useful evidence when an email message is missing
Official references
Reviewed October 31, 2026. Interfaces, vendor availability, and account features can change. Check your current account before making changes.
