Updated: retrieving from external accounts
Update: The issue outlined below has been fixed by our engineers and has been rolled out to all mail users. If you get your mail from an external client (Outlook, Thunderbird, etc.) you should no longer experience this issue. Sorry for the inconvenience.
Some of you are reporting that you are getting the following error when trying to get your mail from external accounts: “Server XXX is busy. Another POP session may be active. Please try again later.”
Our engineers have investigated the issue and found the root cause of the problem. A fix will be rolling out shortly. When it has finished rolling out I will update this post to let you know. It takes a little while to get the fix out since it has to be pushed to so many different servers, so some of you may find the problem is fixed right away, while others may find it takes a bit longer.
Sorry you are experiencing the issue. You can always use the Web version until the issue is fully fixed.
Andrew – Yahoo! Mail Team