Use RoundCube as Internal User Email

[nebmo88]

Hi, I apologise if this has been discussed. I have searched and found nothing.

I want to use RoundCube as an internal mail. So when users on my website login, they can have a mailbox which allows them to email other users. (Basically what forums have... Private Messages).

I am using MySQL. It has a user table. When the user logs in, it creates some sessions
(userID, accessLevel - admin/staff/user).

How could this be done?

Thank you.