Using Win 7 Pro, 64-bit, with IE 11, and latest Thunderbird. Need to move (i.e., backup and restore) selected, or all, Thunderbird accounts (including POP3 information for each of the accounts), folders, sub-folders, and messages that are in those folders, to Outlook, in a format that Outlook 2007 will recognize and import, while maintaining the same account and folder structure, and maintaining the same email messages that are currently in each of the folders. Have three email accounts at yahoo.com, each of which is a POP3 mail client. Have about 28GB of messages in Thunderbird, consisting of several hundred folders and subfolders, and thousands of email messages, for each of the three email accounts. Thanks. :-)