The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
What works
Agent newsreader functionality
-- Retrieve newsgroups
-- Retrieve headers
-- Download files
-- Automatically create appropriate download directories
What does not
Secure NNTP -- SSL over NNTP to port 563.
What was not tested
-- Spam filtering and killfile
-- Email functionality
-- News article posting functionality.
Additional Comments
I didn't try installing it, just copied the Agent directory from my Windows installation. Agent runs fine without registry entries; it only requires the files in its root directory. It'll create everything it needs in the Data subdirectory.
