To have Yahoo! Mail delete all mail from a particular address automatically: Hover the mouse cursor over the settings gear icon or click that gear. Select Settings from the menu that has appeared. Go to the Blocked Addresses category. Type the unwanted email address under Add an address. Click Block. Click Save.

You can report messages as junk in the Mail app and help filter junk mail in i Cloud. Then future messages from the same sender are marked as junk. To mark a message as junk: On your i Phone, i Pad, or i Pod touch with i OS 7 or later, open the message, tap the Flag at the bottom, then tap Move to Junk.

Click on Options, upper right corner of mail page. Then Mail Options. Click on Spam from the list on the left. In the Add a blocked address box, enter the domain. The domain is the part of the email address after address AFTER the @. Leave out the @ symbol). Click the Add button.

Mark and filter junk mail. You can use the Mail app to mark messages as junk so that later messages from the same sender are automatically marked as junk: On your i Phone, i Pad, or i Pod touch with i OS 7 or later, open the message, tap the flag icon at the bottom, then tap Move to Junk.

Create filters Mouse over the Settings icon. | select Settings. Click Filters. Click Add. Enter a Filter Name. Enter the filter criteria. Select a folder to deliver the affected emails to or select New Folder to create a new one. Click Save. Click Save again to return to your emails.

Log into your Yahoo Mail at https://mail.yahoo.com. Click on the gear menu. Click on Settings, then Filters. Click Add and create a filter that matches @ in the sender and delivers the messages to Inbox. Click Save. Make sure that the new rule is at the bottom of the list.

You can also delete individual messages by clicking the check box next to them and clicking " Delete." To set up automatic deletion of the messages in the Spam folder, select " Settings" from the Settings menu icon in the top-right corner of the page. Click " Security" and choose how often you want to " Empty Spam folder."