Roundcube for webmail client of email provider

[Jose_Martins]

Hi
Im going to create an email provider .
The guys buy there plans and can create a account and login.
For webmail client i am going to use roundcube with skin made by me and enigma plugin.
I need to pay? What restrictions i am going to have ?
(Ps -roundcube is going to be hosted in my servers)
Thanks

[alec]

No, you don't need to pay.

[JohnDoh]

Roundcube is released under GNU GPLv3. A quick summary of what that means can be found on the tl;dr legal website.