Use Vault to restore Gmail messages
If a user permanently deletes important data, you may be able to restore it.
Data deleted within the past 25 days
If the data was deleted fewer than 25 days ago, we recommend that you use the Google admin console to restore a user’s Google Drive or Gmail data.
Gmail messages deleted over 25 days ago
If more than 25 days have elapsed, you can use Vault to restore Gmail messages that are covered by a retention rule or a hold.
- Export the deleted messages from Vault to a PST file.
- Import the messages into Gmail using G Suite Migration for Microsoft Exchange.