Check the Trash folder in Gmail
Use the search bar to find the deleted email
Restore the email from Trash within 30 days
Check the Spam folder
Check All Mail for archived messages
Use Gmail search operators like `in:trash`, `in:spam`, or `older_than:`
If the email was permanently deleted, try Google Workspace admin recovery if available
Contact the sender and ask them to resend the email
Check any connected email clients or backups for a copy
Review Gmail filters and forwarding settings to prevent future loss