jfb login module doesn't allow email for loggin in

I'm assuming you mean username or email? If so, the post below may help you make the changes you'd want to allow for logging in with email. Currently, our JFBCLogin form uses Joomla's own login method. The update will redirect user's to Community Builder's, which allows for a few different variations of username:
www.sourcecoast.com/forums/jfbconnect/jf...b-login-email-layout

Please note that when implemented, the JFBCLogin parameters for Joomla login redirection won't work. That's because CB will be taking care of things at that point.

Finally, we're planning to implement this change in the upcoming 4.0 release, so that if you've selected CB integration in the JFBCLogin module, the login functionality will be taken care of by CB instead.

Hope that helps, and good luck,
Alex