If you want to disable the SSL mode in RoundCube, you need to update Artica to 1.3.081702 version.
- Go into messaging section.
- Click on MailBoxes tab
- Select RoundCube WebMail System.
- On the "Page 1" , turn to red the HTTPS field.
- Change the listen port to a new port
- Turn to green the "Enable Dedicated Web site"
- Wait until the Status turn to green.
You can now browse RoundCube to http://server:port
