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由 hm9999z 发表于 April 3, 2016 ·

Installed "ImportExportTools" extension as instructed, but the "Import mbox file" option is grey i.e. not usable under menu "Tools/ImportExportTools".
Can anyone please tell me any other alternative to import mbox file? Thank you very much!

这个评论是针对附加组件的一个早期版本的（3.2.4.1）。 

作者 Paolo "Kaosmos" (开发者) 日期 April 3, 2016 ·

As it's written above,

"Note: if you want to import messages or MBOX files, you must first select a valid folder as a target, otherwise the import options are disabled"

Select "Local Folders" and the option will be active