How do I add to and remove names from my categories (groups) of people with a similar interest ? Since they "improved" the website, I can't find any way of doing this.  Help welcomed

Robin
Hi all,
Recently I have begun to receive junk mail that deals with sexual subjects in which I have no interest.  I have sent countless email addresses to the blocked list but the message continue to flood my junk mail.  Is there a way to block words or phrases used in the subject line of an email.  Virtually all of these emails have certain common words in the subject.
Thanks. Cheryl