block domain
Although I blocked a domain (uk. o r g) quite a while ago, recently emails from that spammer started making it into my spam inbox. Yesterday I re-entered that domain in my settings block list. Today their spam is in my regular inbox. Does the domain blocker no longer work? Their stuff is really annoying and prolific.

Hi there. I'm sorry you're experiencing this issue! Spammers are constantly evolving their practices and blocking their email addresses/domains does not help much as they are mostly sending emails from spoofed addresses or they send the same content but from different email addresses, which makes it look like they are coming from the same email address/domain. Marking them as Spam teaches your personal filter to recognize them as Spam. You can also create filters, here's how: https://help.yahoo.com/kb/filters-organize-yahoo-mail-sln28071.html