Outlook doesn't handle the New_Mail event very well, you're better off adding a button to your outlook ribbon that you press manually once the emails arive.
but to answer your original question of can Outlook call Excel, the answer is yes and if you add a reference to excel in outlook you can do it all within Outlook's VBA editor.
General outline of the process using Outlook's VBA editor:- on the menu bar: Tools>References
- select: Microsoft Excel 15.0 Object Library (your version number may be different depending on which excel you have)
- click OK
Bookmarks