The user interface is really confusing. There is a X right on top which closes Thunderbird. In the statusbanner every mail occurs with the title and an X to remove it from the banner. Until that point no problem. But I keep my archive on my NAS server as .eml files. When I open one of them they do't appear in the opened Thunderbird, but in e new window with the X for closing ricght in the top.. So when I am reading my new e-mails and want to open an old one it is in a new window with the close X right on top. Moving around between new and archived mails is confusing. The new mails mus be closed on the banner and the archived mails right on the top. Which means that during working like that I close Thunderbird itself many times, have to restart the profile again etc. Not very speed improving. I see two options: First: open arhived e-mail not as an extra window but within the mail screen second: make it possible to point to a local map within "local maps", or make it possible to archive in local maps outside Thinderbird, hence in any local map on my computer (or NAS server) Then the user interface with a banner for opened e-mails is similar for archived mail and new ones.