Domain or webmail hosted in Plesk is not accessible: This site can’t be reached

Symptoms

• The website example.com (or webmail webmail.example.com) shows incorrect content in web browser or it is not accessible:

  PLESK_INFO: ERR_NAME_NOT_RESOLVED

  OR

  PLESK_INFO: This site can’t be reached

• The nslookup utility can't find domain or webmail name:

  # nslookup example.com 8.8.8.8
  Server: 8.8.8.8
  Address: 8.8.8.8#53
  
  ** server can't find example.com: NXDOMAIN

  # nslookup webmail.example.com
  Server: 8.8.8.8
  Address: 8.8.8.8#53
  
  ** server can't find webmail.example.com: NXDOMAIN

• A DNS record presents on the name server where DNS "example.com" zone is hosted:

  # nslookup example.com 203.0.113.2
  Server: 203.0.113.2
  Address: 203.0.113.2#53
  
  Non-authoritative answer:
  Name: example.com
  Address: 203.0.113.2

• NS records have been changed recently.

• Incorrect certificate is showing for domain

Cause

Domain name cannot be resolved into correct IP address.

Resolution

1. Log in to Plesk
2. Go to Domains > example.com and determine IP address assigned to the domain:

   

3. Log in to DNS management panel of registrar company, example.com name was purchased from.

4. Create/update NS-record for example.com pointing to the actual Plesk IP address.

5. Wait until DNS update propagation is finished. This process can take 24 to 48 hours.