Sorry for the inconvenience. You've stumbled upon an unexpected, temporary problem. Performing your action again in a few moments will likely resolve the problem completely. If not, we suggest you try re-launching Yahoo! Mail. If the problem persists, feel free to contact Customer Care about Error Code 15. WHY DOES YAHOO MAIL CONTINUE TO ****!!!!!!! Thanks, The Yahoo! Mail Team

SOURCE: II am getting this message

Just keep on refreshing the Yahoo Mail site every now and then. They might be doing some technical repairs/upgrades. As long as you are confident and sure of your account name and password, there's nothing to worry.

SOURCE: I am unable to access my email. Mail has been

try this
1.Delete the temporary internet files ... in ie8...click on tools >delete browsing history.
2. close the internet explorer and then try again.

SOURCE: dear ser this maseg show when open email : Sorry

Please update your Adobe Flash Player plug ins for browser. and Let us know.

Thanks

SOURCE: Sorry for the inconvenience. You've stumbled

You are one of the many that has been affected by this downtime. Yahoo' s servers are currently down at the moment and they are already checking on thin. However, there is no turn around time for the fix just yet.

Hope this helps. Have a great one!