I am considering switching to Thunderbird, but need to know answers to all of the following 4 questions about using v.45 of Thunderbird with a hotmail account on Outlook.com: 1) In v. 45, does the program offer the "classic" view or layout of Inbox Message list at top of screen and horizontal preview message pane shown beneath the Msg List? 2) Also in V. 45 in this "classic" view, will the subject/sender of unread emails be shown in the list in boldface, but regular (non-bold) font once the message has been read? 2) In v.45, If using IMAP for Outlook.com with large inbox (20,000 emails), after initial set-up, will speed and response be similar to Windows Live or how much slower---an extra 10 secondsdaily at start-up? Or an extra 5 or 10 or more minutes all the time?? 3) In v. 45, Can I create a view or Message List that combines two accounts--specifically, Inbox for Outlook Com, and Inbox for Gmail (also using IMAP)? (Like Live mail "quick views")--with the Msg Preview pane shown below it? 4_And in v. 45 can a second such combined view be available showing just Unread messages for both accounts? (also like Live Mail "quick views?") -with Msg Preview pane shown below it? Thank you very much. For the two users in our household, it is important to find these features which all seem to be gone in the Windows 10 Mail app.