When I have selected an email in the search results and see it in the preview pane, I can double on its attachments to open them. The attachment's filename is modified to something like tmp123456.. . Those modified file names make the attachment harder to work with; for instance, when they are grouped together in the task bar and you click on the group, the file name does not help you identify the open attachment.
The original file name should be preserved when opening attachments from the preview pane.
The original file name should be preserved when opening attachments from the preview pane.