app/views/notifier/_main_footer.html.erb
<p style='text-align:center;text-transform:uppercase;color:#AAA;'>
<% if @key %>
If you have subscribed in error or wish to unsubscribe at any time, Please <%= link_to 'click here', unsubscribe_url(:email => @user.email, :key => @key)%><br/>
<% end %>
Copyright © <%= Time.zone.now.year %> <%= I18n.t(:company) %>
</p>