SPAM
Something has changed with your ability to keep the spam out because I am getting a whole bunch more than I used to. It appears there are a lot of other folks interested in your ability to keep spam out. I don't know what has recently changed but it's much more than it used to be. While on mobile you need to actually click on the mail in order to block it by clicking on the sender's email address. Some are so clearly a spam address because it is random letters and number at random letters and numbers yet it still gets through. Infuriating.
2nd
ranked
