SYMPTOM:
When sending bulk export report for file or email delivery through distribution services in Strategy Web 9.x and 10.x, the resulting file will have no extension. However, if the bulk export file is compressed, even though the file delivered will have a .zip extension, when uncompressing, the resulting file will also not have any extension of its own.

CAUSE:
This behavior is by design. The objective is that the end user may have the flexibility to open the file with any application since a bulk export file is usually just a text file. The information can be accessed (and associated) with notepad (to a certain size limit), wordpad, excel or any other application supporting a large text file.
ACTION:
The user can rename or add the extension to the bulk export file as convenient or associate the file to a particular type of extension or application.