The website example.com (or webmail webmail.example.com) shows incorrect content in web browser or it is not accessible:
This site can’t be reached
The nslookup utility can't find domain or webmail name:
# nslookup example.com 188.8.131.52
** server can't find example.com: NXDOMAIN
# nslookup webmail.example.com
** 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
NS records have been changed recently.
- Incorrect certificate is showing for domain
Domain name cannot be resolved into correct IP address.
- Log in to Plesk
- Go to Domains > example.com and determine IP address assigned to the domain:
- Log in to DNS management panel of registrar company, example.com name was purchased from.
Create/update NS-record for example.com pointing to the actual Plesk IP address.
- Wait until DNS update propagation is finished. This process can take 24 to 48 hours.