Issues with mail-imap.stable.qloud-b.yandex.live access could stem from improper redirect settings between different versions of the site. Check the following links for alternative routes:

http://mail-imap.stable.qloud-b.yandex.live https://mail-imap.stable.qloud-b.yandex.live

Or return to the current status page of mail-imap.stable.qloud-b.yandex.live.