anchor.diff:                      <tr>
                           <td style="padding: 60px 0 0;">
                               <center>
  -                                <img src="<%= Rails.application.config.action_mailer.default_url_options %>/assets/refer.jpg" alt="Refer Friends, Earn Rewards" style="display: block; margin: 0 auto; padding: 0; border: 0;">
  +                              <%= image_tag("refer.jpg", alt: "Refer Friends, Earn Rewards", style: "display: block; margin: 0 auto; padding: 0; border: 0;") %>
                               </center>
                           </td>
                       </tr>
  
positive.code:                     <tr>
                          <td style="padding: 22px 0 0;">
                              <center>
                                  <img src="<%= Rails.application.config.action_mailer.default_url_options %>/assets/thetrunksale-is-coming.jpg" alt="The Trunksale Is Launching! We've created the only place you'll need to go to shop designer fashion from independent boutiques at up to 70% off. You'll be the first to know when The Trunksale is live." style="display: block; margin: 0 auto; padding: 0; border: 0;">
                              </center>
                          </td>
                      </tr>
  
negative.code:                     <tr>
                          <td style="padding: 27px 0 27px;">
                              <center>
                                <%= image_tag("logo.jpg", alt: "The Trunksale", style: "display: block; margin: 0 auto; padding: 0; border: 0;") %>
                              </center>
                          </td>
                      </tr>
  