But then, a few weeks or months later, you realize you’re missing important emails. Maybe that “annoying” sender was actually your child’s school, a vendor with an invoice, or a friend who changed email addresses.
In any Gmail tab (Inbox, Sent, Spam), look at the top right corner. You’ll see a gear icon. Click it. A dropdown menu will appear. At the top of that menu, click “See all settings.” how to unblock an email address in gmail
Find the email address you want to restore. Click the blue “Unblock” link directly to the right of their address. Gmail will ask you to confirm—click “Unblock” again in the pop-up window. But then, a few weeks or months later,