I dont use yahoo mail anymore really, they actually blocked my server email lol when i used to use yahoo to get my mail before gmail, they blocked my server because thats where the spam emails came from lol wtf :D My host couldn't even figure it out for like 12hours when I asked him why I couldn't get my mail at yahoo anymore, then he found out yahoo blocked the server, which he never checked until last because who the fuck would even expect that
I do have like 500,0000000000000000000000000000000000000000000000 0000000000000000000000000000000 or so unread emails in my yahoo account tho, none not spam :D