Yahoo email stopped working on all my iOS devices

The subject says it all - for the last 2 days I cant download Yahoo email in iOS Mail app anymore (both on my iPhone and iPad). It does not give me any error message, I simply don't get any new email.

Yahoo email seems working fine via Microsoft Outlook on my desktop PC. All my other email accounts - Gmail, Outlook - do not experience any problems in iOS Mail. I rebooted, deleted the Yahoo account and put it back, nothing works. It is just weird.

Thanks for any advice,

Bumbrlik

iPhone 6+, iOS 8.2

iPad 4, iOS 8.1