app/views/spree/products/_mail_to_friend.text.erb
<%= @mail.recipient_name %>,
<%= Spree.t(:you_would_like_this_item, scope: :email_to_friend) %>
* <%= @object.name %>
<% unless @mail.message.blank? -%>
<%= @mail.message %>
<% end -%>
<%= @mail.sender_name %>
<%= Spree.t(:click_link_to_view, scope: :email_to_friend, name: @object.name) %>
<%= spree.product_url(@object) %>
<%= Spree.t(:visit_page, scope: :email_to_friend, url: spree.products_url) %>