1) You need to modify the ROUNDCUBE source code [login to view URL]
2) I will provide you my email server with RoundCube client.
3) You need to addon the encryption and decryption function. I will provide you the encryption and
decryption API once project is confirmed.
4) This RoundCube client customization must be able to install at any other server.
5) For this project, if some of the function have issue during the testing, we need you to fine tune to make
6) You need to create your own database (if any)