In your browser’s address bar, go to http://webmail.<your-domain-name>.com (e.g. http://webmail.digical.com). No “www”.
Then sign in with your full email address and your email password.
Once you login, you can do various things such as:
- Change your email password
- Setup a Vacation Message or Auto-Responder
- Access your email on the road or on your vacation.