Error creating new certificate

[salveankita]

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: https://www.tradethon.com/

I ran this command:
install lets encrypt secure with webmail

It produced this output:
Invalid response from https://acme-v01.api.letsencrypt.org/acme/authz/6aiPKoMlUey-DC8yNvbvyZX7UaW5gISaGimggJnnICk.
Details:
Type: urn:acme:error:connection
Status: 400
Detail: dns :: DNS problem: NXDOMAIN looking up A for webmail.tradethon.com

My web server is (include version):ngnix

The operating system my web server runs on is (include version):Linux

My hosting provider, if applicable, is: Plesk Onyx 17.8.11

I can login to a root shell on my machine (yes or no, or I don’t know):I don’t know

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):Plesk

[JuergenAuer]

Hi @salveankita

@salveankita

Detail: dns :: DNS problem: NXDOMAIN looking up A for webmail.tradethon.com

there is no ip address (A- or AAAA-record) defined (via https://check-your-website.server-daten.de/?q=webmail.tradethon.com ):

Host	T	IP-Address	is auth.	∑ Queries	∑ Timeout
webmail.tradethon.com		Name Error	yes	1	0
www.webmail.tradethon.com		Name Error	yes	1	0

Your Plesk uses http-01 - validation, so you need a running webserver with that domain name.

Your main domain is ok:

CN=tradethon.com
	13.03.2019
	11.06.2019
expires in 90 days	tradethon.com, www.tradethon.com - 2 entries

Perhaps add an additional webserver / vHost (I don't use Plesk), so that webmail... answers.