Thanks It worked but I only had one batch that worked. Afterwards I have in auto and manual: Cleaning unfinished data: 200 images.
I have already read this topic, and as I told you I have configured an SMTP client to send mails, but that did not solve the problem. I tried with several different sending emails. I don’t understand. By disabling all plugins and activating a base theme, still the same problem. My wordpress version is up to date. The plugins indicates that a reminder will be sent. In the logs I have no errors. It is frankly incomprehensible. Thnaks