First, it is helpful to understand the two primary ways Yahoo handles unwanted email, as the solution differs for each. There is the "Blocked Addresses" list, which is your manual creation. When you add an email address here, Yahoo sends any future emails from that sender directly to your Spam folder. The other method is simply marking an email as "Spam." Doing this trains Yahoo’s internal filters. However, unblocking a sender is distinct from un-marking a non-spam message. If you have a specific address, you must go into your settings to remove it.
There are several reasons why you might stop receiving emails from a specific contact: you may have accidentally blocked them, or a valid sender might be getting caught in your Spam folder. Yahoo Mail handles these situations in two different ways: and Blocked Domains . unblock sender yahoo mail
After you have removed the block, it is wise to perform one final, proactive step. Check your folder. It is possible that legitimate emails from this person are already sitting there, having been filtered out during the block period. Select any messages you want to keep and click Not Spam . This helps retrain Yahoo’s filters, teaching the algorithm that you want to see this sender’s future messages. It’s the equivalent of telling your digital bouncer, "It’s okay, let them in from now on." First, it is helpful to understand the two
Adding a sender to your Yahoo Contacts list acts as a "safe sender" signal to the spam filters. The other method is simply marking an email as "Spam