def new_post(name, email, post, discussion)
      @post = post
      @discussion = discussion
      @name = name

      mail :to => email,
           :subject => I18n.t('cornerstone.cornerstone_mailer.new_post.subject',
                              :topic => @discussion.subject)
    end
def new_post(name, email, post, discussion)
      @post = post
      @discussion = discussion
      @name = name

      mail :to => email,
           :subject => I18n.t('cornerstone.cornerstone_mailer.new_post.subject',
                              :topic => @discussion.subject)
    end
Email a single participant within a discussion - refer to post observer