To access the webmail for viewing your email, please use this link
http://yourdomain.com/webmail/ (Replace yourdomain.com with your own domain name)
However, there may be cases when there may be problems when trying to access this URL. Primarily, this may be due to the fact that you are behind a firewall which prevent the access of the webmail via a specific port.
A workaround to this will be to access the webmail using the following link:
http://webmail.yourdomain.com (Replace yourdomain.com with your own domain name.)