10:32 AM PST: Business Email maintenance until November 21
From November 11 through November 21, 2009, we will be upgrading our Yahoo! Business Email servers as part of our ongoing efforts to bring you the best email service possible.
During this time, you may encounter a “Temporary Access Error” message when trying to access your Business Email account. If you see this message, please try accessing your mail again in a couple of hours, after which maintenance on your server should be complete and normal email service restored.
Note that you will not lose any data during this maintenance period.