SMTP connect() failed.

-- url of the page with the problem -- : www.puntobenesseresrl.it
-- HikaShop version -- : 4.5.1
-- Joomla version -- : 3.10.9
-- PHP version -- : 7.0.33
-- Browser(s) name and version -- : CHROME 101.0.4951.64 (Build ufficiale) (x86_64)
-- Error-message(debug-mod must be tuned on) -- : SMTP connect() failed. github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

Hello,

e-mails worked fine until this morning orders, but from 2 in the afternoon, however, the confirmation e-mails sent by the site to both the customer and me stopped working ( orders are correctly created )

This is the message I receive if I place an order:
SMTP connect() failed. github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
And the confirmation mail is not sent.

If I go in Joomla > Global Configuration > Server > Mail Settings, everything is fine, and the button "send test mail" works right and I receive the test mail, so I do not know what's going on.

Thanks.

I'll check with my provider, thanks