Hi to all.
I have to apologize for an dummy mistake i made all this time. On the “Send test mail to this email address after saving the settings (leave empty to not send a test mail):” i did not set the email address but a test message . I thought the email was the administrator’s one used automatically. 
. On the other side i had set the email log to send me only Errors. During all this time the errors where e few. So no email was send to me. Thanks for all the support and good work to everyone.