Hello John,
here is system status: https://www.dropbox.com/s/4lyq7tgg0i8si1w/SystemStatus.docx?dl=0.
Reading various topic here it seems it is a quite common problem that nobody solved it. I have already checked other plugins and this is not a problem related with them. I have also contacted my provider and this is not related with the server too.
Looking forward to hearing news from you.
Thanks, Mattia.
