1. Firstly, open the Gmail Android app on your phone.
2. When it opens, scroll down and locate a message from someone you want to unblock.
3. Open this message.Now, hit the button ‘Unblock Sender.’
4. Similar to unblocking a specific sender, just open the message if you want to block someone.
5. Next, tap the three vertical dots beside the sender’s name.Hit the ‘Block’ button.That’s it, now you know the steps to Gmail unblock email address on the web and mobile app.