[Evolution] Include Remote Tests

[MJang <mike mommabears com>]

Folks, 

Just wondering if there's a description somewhere of what is done with
the "Include Remote Tests" filter in the Junk Mail settings.

I've seen the basic description from the docs, but it's somewhat vague,
for example:

What is the list of "known junk messages?"
Which anti-spam blacklists are used?

The description implies (IMO) that there are other tests involved as
well, but I can't find any specifics.

Thanks,
Mike