VBAで以下を実行する
フォルダパスの部分は変更する
Sub a()
Dim OL As Object
Dim msg As Object
Set OL = CreateObject("Outlook.Application")
Set fso = CreateObject("Scripting.FileSystemObject")
For Each file In fso.getFolder("C:\XXXXXXXXXXXXXXXXXX\YYYYYYYYY\ZZZZZZZ").Files
strFileName = file
Set msg = OL.CreateItemFromTemplate(strFileName)
Debug.Print "To: " & msg.To
Next
End Sub