Web Mail, sometimes spelled webmail, is a method of managing email for your web site(s) online. By using webmail, you can access your email from anywhere, as long as you have Internet access and a web browser (such as Internet Explorer, Google Chrome, or Firefox).
dotCanada offers two different webmail solutions: Horde and SquirrelMail. Some accounts also include RoundCube, though this is being phased out. All three will retrieve your email files from the same place; use whichever program suits your personal preference.
dotCanada’s informative video tutorials have further instructions on how to use Horde, SquirrelMail and Roundcube:
http://www.dotcanada.com/secure/knowledgebase.php?action=displaycat&catid=7