Lets Encrypt won't install

I get below error on instal with putty, not installing lets encrypt ssl

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.

This is /var/log/letsencrypt/letsencrypt.log

Is there a way to manually install lets encrypt?

I have removed the contents of the /home/user-data/ssl/ directory and run sudo mailinabox, but still getting same issues

I need help.
thanking you all in advance

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?

Find screenshot for TLS/SSL page
Screenshot_1

and i can access my email and admin area with box.mydomain.com/admin, this shows the domain has resolved to my IP, also checked on mxtoolbox.com, https://dnschecker.org/, ping.eu

I think i will try again in few days

In the terminal type:

nslookup acme-v02.api.letsencrypt.org

What is the response?

-bash: nslookup: command not found

Who is your VPS provider?

What is the output of:

lsb_release -a

I get this
Screenshot_1

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.|

Can’t i connect with outlook?

Which version? Real old versions will not work.

I am using Outlook 2010
Also can’t connect to smtp mailer software too.

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.

thank you for your feedback

You need to be much more specific as to what you mean by “SMTP software”.

bulk mailer like gammadyne mailer and turbo mailer

Then I suggest that you confirm that they use TLS 1.2 or TLS 1.3.

You need to install DNSUtility:
sudo apt install dnsutils
apt install dnsutils

to get nslookup working

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