There is only one file type that uses the .WPOST extension:
Windows Live Writer Post File
Web blog post created by Windows Live Writer, a blogging program included with the Windows Live Essentials Pack; saves a blog post entry written by the user and can contain images, videos, and maps as well as the written text.
WPOST files allow you to write blog posts offline and then publish them when online. They can also be used for transferring posts to another computer and then publishing them.
NOTE: Microsoft Windows Live Writer is discontinued.
|Microsoft Windows Live Writer||Free|
Updated: December 3, 2018