Valid Email in SPAM Folder
After 5 + years of receiving emails from quora,com (all valid) without issue, within the last month all emails from that domain are now going into the spam folder. All addresses are in my contacts and the filters I had were all operating correctly without issue. No matter how many times I select the emails and declare NOT SPAM and they then go back to my inbox, newly received emails still are going into the spam folder. I am a paid contributor (I answer questions that I receive) on quora. This action on emails that I want and are necessary require that I go line by line through the SPAM folder as yahoo does not allow the SPAM folder to be searched. What is the problem? Why are emails from this valid domain being censored without exception?