Hi guys !
I find this problem where when I download excel file from an email I read using ews email, it says this (in the picture below)

I've tried to download the file using other method like uploading the same excel file and downloading it, and it works just fine. So I think the problem is not on the excel file but in the ews email reading.

I've tried to change the extension from "xlsx" to "xls" but the problem still exist.

Can anyone know how to solve this problem ?