Request to unblock IP


We just migrated our servers from CloudLinux & cPanel to Centos & Plesk. We utilise LetsEncrypt Extension to issue an SSL Certificate. I am start receiving errors and I am gessing it is related to the IP beeing blocked. We have a total of 92 Domains.

Would you please assist in unblocking our IPs:
CORP Office IP:

My domain is: *

I ran this command: Reissue Certificate | Secure the wildcard domain (including www and webmail)

It produced this output:

Could not issue an SSL/TLS certificate for

Could not issue a Let’s Encrypt SSL/TLS certificate for . Authorization for the domain failed.

Invalid response from


Type: urn:ietf:params:acme:error:dns

Status: 400

Detail: DNS problem: NXDOMAIN looking up TXT for

My web server is (include version): Centos 7 & Plesk

The operating system my web server runs on is (include version): Centos 7.7

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or 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

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):

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Hi @NHletsencrypt

that's wrong. Please read your error message.

Then read

If you’ve hit a rate limit, we don’t have a way to temporarily reset it. You’ll need to wait until the rate limit expires after a week.

Checking your domain - is your name server. There is no required TXT entry visible.

Your plesk must change your name server, not only a local zone.


I can confirm that @JuergenAuer is right (thanks!): This isn't the error you would see if your IP address were blocked.

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