Mail overload

Just got back. More on this later. I think I'll unpack first, otherwise I'll leave it, and it'll irritate me. Just a few minutes online, to collect my mail. Wish I hadn't, because I'm annoyed already. I've been away for nine days and my Yahoo mailbox is completely full. Over 250 messages, and about 10 of those aren't spam. Meanwhile my inbox was locked, can't send or receive anything new untill I delete something. Can't they install a decent filter? Sigh. I'm seriously thinking of leaving Yahoo.