On control panel, I get this when i try to provision lets encrypt ssl, domain and box.domain.com is properly resolved to my vps IP and my email can send and receive messages.
The error message that you have posted shows that there is an issue with name resolution.
Often times, that is a glitch that goes away and you just need to try again later. Other times it is a networking problem - but if you are receiving and sending emails, that would not be the case here
So, maybe try again? I am assuming that you are getting the blue ‘provision’ button on the TLS/SSL page for the domain, correct?
Have been trying to connect to outlook , and i am having authentication problem
|Protocol/Method|IMAP|
|Mail server |box.domain.com|
|IMAP Port |993|
|IMAP Security|SSL or TLS|
|SMTP Port|587|
|SMTP Security|STARTTLS (“always” or “required”, if prompted)|
|Username:|Your whole email address.|
|Password:|Your mail password.|
Outlook 2010 is too old. Please update your client.
No idea about the smtp mailer software, but suspect the same. It has to support TLS 1.2 or TLS 1.3 connections. TLS 1 and TLS 1.1 were both End of Life in March and are no longer supported hence why your version of Outlook no longer works.