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how to create an association in folder options panel in order to open an e mail

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when trying to open attachment, it tells me that this file does not have a program associated with it to perform this action. I have to create an association in folder options panel.

how do i do that?

when trying to open attachment, it tells me that this file does not have a program associated with it to perform this action. I have to create an association in folder options panel. how do i do that?

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