opensmtpd_rails_frontend/app/views/domains/index.html.erb

<h1>Domains <%= link_to "Add new domain",new_domain_path %> </h1>

<div id="domains">
  <ul>
  <% @domains.each do |domain| %>
    <li><%= link_to domain.domain, domain %></li>
  <% end %>
  </ul>
</div>