folders won't come down

Had to go to Yahoo. I had about 50 folders that I made. None will come down. They are on Yahoo & I can get them with the Yahoo app but neither Outlook or BlueMail will download them. I set thus up about 4 days ago.

Also Yahoo would not accept my Comcast address even after I changed the imap & smtp settings. I had to generate an app password thru Yahoo to get anything. 

I have a second Comcast account & it works perfectly.