public function boot()
{
    $user = User::find(3);
    $emailProvider = null;
    //Split email in [0] someusername and [1] somedomain
    $emailArray = explode('@',$user->email);
    $domain = $emailArray[1];
    switch($domain)
    {
        case 'someProvider.com':
            $emailProvider = new SomeProviderEmailServiceProvider(app());
        break;
        default:
            $emailProvider = new DefaultEmailServiceProvider(app());
    }
    $emailProvider->boot();
}


public function register()
{

}