Website or webmail configured in Plesk shows Web Server's Default Page or Plesk login page.
The nslookup utility shows that the website is resolved to a public IP address that is available in Plesk at Tools & Settings > IP Addresses:
# nslookup example.com 18.104.22.168
A different IP address (public or private) is selected for this domain at Domains > example.com > Web Hosting Access:
Private or incorrect public IP address is assigned for the domain.
- Log in to Plesk
- Go to Domains > example.com > Web Hosting Access and set the IP address on which domain is resolved globally: