Hi, I am using Newsletter Out-of-the-Box, and wonder about the following.
The spacing between links/items differ between blocks. For example, see the screen shot where there is no linebreak between items in the block extracting Articles from a Article page. The same goes for items from Blogs.
In all other blocks I use, there are Linebreak between items, for example in Forum topics as in the screen shot below.
If you share your email (DM) I can test-send a newsletter to you.