I tried that. Still it does not work

• Used "feed outline" with different settings (First all the levels selected and later with Only Unauthenticated selected). Cleared the cache after changing. Still I cannot see the public content on the main page without logging-in.
• Using firefox in Private browsing mode when not logged in, just to make sure browser is not caching..

First with with All levels selected.

When logged, I can see the public posts.

But without logging in , only this page

Next with Unauthenticated only selected, I cannot see anything even when logged in (as expected)

This is the home page where I added the block

I can PM you my test site if needed..