In the process of using Gmail, you have accidently deleted an important email and you don’t know how to take it back. Don’t worry. You can restore deleted emails in the condition they remain in the trash in the last 30 days.
Here are the simple steps which will help you to recover your deleted emails in Gmail:
Step 1: In the main interface of Gmail, click on More ->Trash in the left column. That is the place storing your deleted emails in the last 30days.
Step 2: Tick on emails that you want restore (can select more than one)
Step 3: Move cursor to the Move icon then select Inbox
So the emails that you want to restore is already in the Inbox. From now you can easily restore deleted emails as long as in allowed time (no exceed 30 days)
See more: How to restore deleted contacts in Gmail