To access webmail you require your email address and password.

Navigate to mail.yourdomain/webmail in your browser. If your domain was example.com, the address would be mail.example.com/webmail .

Use your username (full email address) and password to log in, then to read your mail, choose one of the options available - Horde, Squirrel or RoundCube. Each has its own positives, however RoundCube is a layout many prefer.