- Plesk for Linux
- Plesk for Windows
When opening webmail in a browser, it returns one of the following errors:
Firefox: "Server not found. Firefox can't find the server at webmail.example.com"
IE: "Internet Explorer cannot display the webpage"
Chrome: "Oops! Google Chrome could not find webmail.example.com" or "ERR_NAME_NOT_RESOLVED"
Additionally, Horde webmail is known to display this message: "Unable to connect to webmail. Please contact us for further assistance."
Webmail is not resolving correctly in global DNS system because Plesk server is not added to name servers in registrar panel.
To verify the root cause, run the following commands in a command-line interface:
MYSQL_LIN: nslookup webmail.example.com
nslookup webmail.example.com <plesk_server_ip_addr>
If the first command does not return anything or returns a wrong IP address, and the second command returns valid records, then Plesk server is not serving the DNS zone for a domain.
There are two options to resolve the issue:
add Plesk server to the list of DNS servers (contact your registrar);
CNAMEDNS entry onto registered name servers.
If the steps above did help, refer to the article: Webmail of a domain without hosting is not accessible: 404 not found