Why is there a constant error page?
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Temporary error: ymws:Server.MailboxOpenFailed
That "Server:Ma...." message can't be fixed by you. One of the Yahoo Staff said that they have to get into your account to fix it. Notify help.yahoo.com so they can fix it.9 months ago
I would try using Yahoo Mail Classic for the time being. Yahoo is in the process of making alot of changes and 'upgrades.' It may be several weeks until they get all of the bugs worked out.
Recently, Yahoo has made it more difficult to return to Classic - they have killed off some of the old links and removed the 'Switch to Yahoo mail classic' button from the new version.
Here's how to go back to CLASSIC:
This is a brand-new link that should work for quite a while...
(copy and paste it to your Desktop, or anywhere else, if you prefer)
Evidently, they are still making updates to Classic Mail (Messenger is now gone, for example), and eventually the older links stop working. (Older links found on the web have a different number after the .mc)
Before you can use the new link, you will need to temporarily change your Internet Options settings:
Go to Control Panel > click Network and Internet > click Internet Options > click Security tab > click Custom Level box (near bottom) - a new dialog box will open > scroll down the list of options to Scripting (near the bottom) > right under Scripting is Active Scripting, click Disable > click OK > click Yes in the 'Are you sure' pop-up box > (pop-up and dialog box will close) > do not click OK or Cancel or close the Internet Properties box yet...
Next, go to your Desktop (or wherever you saved your link) and click your new shortcut to us.mc1634.mail.yahoo.com/mc/launch
Then, change the settings back (you need to have scripting enabled for Yahoo Mail Classic and many other websites to fully function):
Go back to the Internet Properties box (on your Taskbar) and click the Custom Level box > scroll down to Scripting > click Enable under Active Scripting > click OK > click Yes in the 'Are you sure' pop-up box > now click OK to close the Internet Properties box.
PLEASE NOTE that you will only have to change your settings ONCE - the link will work fine after you do this once!
I hope this helps all of you who, like myself, CAN'T STAND THE NEW INTERFACE!
LONG LIVE CLASSIC!
PS - You can return to the NEW Mail at any time by clicking anywhere on the Yahoo Mail Classic text-box in the upper-left corner, or by clicking on Mail on www.yahoo.com home page. To return to Classic, use the link provide above.
Source(s)by Spuddy - 9 months ago