anchor.diff:              hr {
                   border: 0;
                   height: 1px;
  -                background: #DCDEE0;
  +                background: #E9E9EB;
                   margin: 25px 0;
  -            }
  -            table.body-wrap {
  -                width: 100%;
  -                max-width: 600px;
  -                margin: 0 auto;
  -            }
  -            .collapse {
  -                margin: 0!important;
               }
               h1, h2, h3, h4, h5, h6 {
                   font-weight: bold;
  
positive.code:     <head>
          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
          <meta name="viewport" content="width=device-width" />
          <style>
              iframe {
                  display: none!important;
              }
              * {
                  margin: 0;
                  padding: 0;
              }
              * {
                  font-family: Helvetica, Arial, sans-serif;
              }
              img {
                  text-decoration:none;
  
negative.code:             h3, h4, h5, h6 {
                  font-size: 18px;
              }
              p, ul, ol {
                  margin-bottom: 16px;
                  font-weight: normal;
                  line-height: 1.6;
              }
  