Hi Stefano, Paulo here, thank you for getting back to me.
I have set the log level to debug as you requested.
Here's the page which you can use to test. This is also the dedicated page for the newsletter plugin
I am using the standard subscription form shortcode [newsletter] on that page.
On the status page, there is indeed a message:
"Dedicated page content -> MAYBE -> The page seems to not contain the [newsletter], but sometime it cannot be detected if you use a visual composer. Please, check the page."
I don't believe this is a problem, because as said before, the messages are correctly presented, it's just the automatic emails with are not being sent as part of the process.
cristinanogueiradafonseca.pt/happy-mail/
Let me know if you need anything else form my side.
Cheers,
Paulo