Open the Mail app
Go to Mailboxes
Tap Trash or Bin
Find the deleted email
Swipe left on the email
Tap Move
Choose Inbox or another folder
If using Gmail, open the Gmail app
Tap Menu
Open Trash
Select the email
Tap Move to
Choose Inbox
If using Outlook, open the Outlook app
Go to Deleted Items
Select the email
Tap Move
Choose Inbox
Check the Archive folder
Use the search bar to find the email
Check the All Mail folder if using Gmail
Restore from iCloud Mail if available
Sign in to iCloud.com
Open Mail
Check Trash
Move the email back to Inbox
Check Recently Deleted if your email provider has it
Recover the email before the trash retention period ends
Contact your email provider if the email is permanently deleted