Creating multiple instances through fields_for in a Rails form and how to access the resultant hash

I asked a related question previously here. However, it may have been confusing as I was unable to get an answer. Therefore I shall ask a simpler question. For my Invitation Model, how do I submit more than 1 invitation at a time and after submission how do I access the data in resultant array/collection of hashes?

The Invitations model has a :email string attribute and through form submission, I want to achieve something like the following(I'm assuming that'll be the best setup?):

"@invitation" => {
  "@invitations" => [
    {"email" => "example@hotmail.com" },
    {"email" => "example@yahoo.com"},
    {"email" => "example@gmail.com"}
  ]
}

The Following is the Code I have so far:

The Models

class Scoreboard < ActiveRecord::Base

has_many :invitations

end

class Invitation < ActiveRecord::Base

  belongs_to :scoreboard     

end

The Invitation#new View

<%= form_for [@scoreboard, @invitation] do |f| %> 
        <%= render 'shared/error_messages', object: f.object %>

       <%= f.fields_for :invitations do |invites| %> <!-- Tried Many things here with no success -->
         <div>
         <%= invites.label :email %> 
         <%= invites.text_field :email %> 
         </div>
       <% end %>

        <%= f.submit "Send Invitation", class: "btn btn-primary" %>
    <% end %>

The Invitations Controller

class InvitationsController < ApplicationController

    def new
        @scoreboard = Scoreboard.find(params[:scoreboard_id])
        @invitation= @scoreboard.invitations.build 
    end

    def create
    @scoreboard = Scoreboard.find(params[:scoreboard_id])
    @invitation = @scoreboard.invitations.build(invitation_params)

    if @invitation.save
      flash[:success] = "Invitation sent successfully"
    else
        render 'new'
    end
    end

private

def invitation_params
    params.require(:invitation).permit(:email)
end

end

Invitations#create View

<p> Display all the emails here for all the invitations <p> 

In my original question, I had wanted to access the saved emails so I can mail to them, however if I can figure out how to display all the emails on this view, I can figure out the way the array/hash collections works and using that info, mail them out. Thanks in advance!