So, I'm giving you the addresses of different mail client to direct access to your account:
SquirrelMail : https://www.example.com:2096/3rdparty/squirrelmail/index.php
Note: You must replace example.com with your actual domain name in the above examples.
RoundCube : https://www.example.com:2096/3rdparty/roundcube/index.php
This is really simple, but hope this will help you.