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由 frankzen 发表于 July 25, 2016 ·

I often have to hit the empty 'em button 2 or 3 times before it will do what it says. Other than that, it seems to work

作者 Jens-Uwe Groß (开发者) 日期 July 26, 2016 ·

Please note that folders related to IMAP accounts are processed asynchronously. This might explain why you perceive the button as not responding.