Mail apps aren’t equipped with the ability to block any and all emails from specific senders. If you use Yahoo! Mail and would like to block emails from a specific email address, you are going to have to log on to the desktop version of Yahoo! Mail via

Block Email from Unwanted Senders in Yahoo Mail Basic To add an email address to the list of blocked senders in Yahoo Mail Basic : Select the drop-down arrow next to your account name.

Fortunately, Yahoo email users can nip unwanted emails in the bud with the service's blocking function. Here's how to block an email address from ever reaching your Yahoo inbox, using any internet ...