Good afternoon.
The connection you see is OK, it's a connection to the imap server.
There is no connection to SMTP.
The SMTP server port was specified incorrectly. All mail is now gone.
Those settings that were indicated were provided by your specialist.
[login] => onebox
[status] => error
[message] => Connect SMTP is Fail
Errors can be viewed here "Reports" - "Logging"
https://venbest.crm-onebox.com/admin/shop/report/logs/smtp-2021-02-23.log