Qual è la url (relativa) della pagina e quale la versione di Forma?

What do you obtain?
I mean, $response and/or $error ?

Hi, you should provide more details. Code used to achieve the auth, what errors do you get, and so on.

Diccelo tu quando provi la 4...

Bug

Hi, you'll find a readme file in your downloaded package.
Need to have system knowledge regarding a web environment (XAMP, as I can see).

Manda uno screenshot dell'impostazione permessi attuali.

Hi, please provide details.
What are you trying to achieve, what did you do to achieve, and so on.

I don't know where the process stops, as I'm not on your instance.
Neither I know if your params are correct and what kind of authentication your server is requesting.
An higher smtp debug level could help to investigate where the issue occurs.