You can check your mail either using
- A mail client such as Outlook or Thunderbird
- Webmail
To check emails using webmail please navigate to http://your_domain_name.tld/webmail for example if my domain name is nanresources.com I will enter in the browser http://nanresources.com/webmail if this does not work I wil also try http://webmail.nanresources.com If none of these works, ensure your have access to the internet and your system administrator is not blocking your access to use of PORTS
The use of domain.tld/webmail uses ports for example entering http://domain.tld/webmail will redirect to http://domain.tld:2095 if your system administrator has blocked this port you won't be able to use this kind of URL in this case use http://webmail.domain.tld which uses port 80