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由 Aristo 发表于 Dec. 5, 2009 · 永久链接

This is exactly what I am missing in Thunderbird. Very simple to use and very effectively. I don't need to click-and-click if I want to see "unread messages" and "full mailbox tree". Everything is on my screen. And next improvements? I can suggest only to add possibility to show more then two panels. Great plug-in to great mailbox client.