If Yahoo insists on sending a specific sender to Spam, you can create a forced rule to move it to your Inbox.

This is a comprehensive guide to unblocking email addresses and domains in Yahoo Mail. Because Yahoo frequently updates its interface, this guide covers the current desktop/web browser layout, the mobile app, and additional troubleshooting steps for when emails aren’t coming through.

This is the most reliable way to manage settings.

Unblocking an address doesn't automatically retrieve emails that were blocked or deleted in the past. Here’s what to check next: