Email Stopped Working on New Computer
After setting up email on a new computer, something feels incomplete or wrong — missing folders, missing older emails, or messages not syncing properly between devices.
Quick answer: Missing older emails on a new computer is usually normal and expected, not a fault — many accounts only sync recent mail by default, with the rest staying on the server accessible via webmail. Check the sync settings before assuming anything is actually broken.
Likely causes
- The account is set to sync only a limited time range (common default for accounts using Exchange/modern sync)
- The account type chosen during setup (IMAP vs Exchange) affects what syncs and how
- A migration from a different email client didn't bring across all local data
- Folders that exist locally on the old computer but were never actually stored on the server
What you can safely check yourself
- Check the account's sync settings for a "mail to keep offline" time range and extend it if needed
- Log into webmail directly to confirm whether older emails and folders are still there on the server
- If folders were local-only on the old computer, they'd need to be exported and imported manually rather than syncing automatically
If the old computer had local-only folders or a .pst file that was never backed up or exported, don't wipe or reset it until you've confirmed that data has been copied across — some local email storage doesn't exist anywhere else.
When it needs a proper look
If webmail also doesn't show the missing emails, they may only exist on the old computer's local storage and need to be exported before that computer is retired.