Just downloaded 10565. From what trade press says, mail has been significantly improved (I've been using Thunderbird), so I thought I'd again give it a try. I had to add my account, so I clicked on Add Account, clicked on "Other Account", entered the Email address + Password and clicked Sign In.

The response, "We couldn't find info for that account. Make sure that the email address is correct and then try again."

I checked the email address against the account settings in Thunderbird. They are identical. And Thunderbird is working, having downloaded Email just a few minutes ago.

What should I do?