1. OPEN your browser, then type yourdomain/webmail (ie. leentechsystems.com/webmail)
2. IINPUT Email address and Password, then Log In.
3. Wait for a few seconds for redirecting, then you may now choose either of the three to access your email.
4. A new window will open stating that you are logged in as the email account you chose in Step 4 above. When the page loads, you will have the option to use either Horde or SquirrelMail as your web based email client.