I should also add as it was mentioned, about size of contents of inboxes. I'm very tidy, mine are almost empty. It does appear to mainly affect the 'inbox' as even when it is unavailable other folders for that mail account can be accessed and some of my other folders that work fine do have a lot of things in them. It's quite easy to anticipate whether it will work or not. If the inbox shows up as "inbox" it's fine, if it shows up as "INBOX" it can't be accessed. What capitals have to do with it I don't know. ;-)