I just can't get mso-line-height-rule: exactly to use the line-height I set. Any help would be great!

  <!DOCTYPE html>
      <meta http-equiv="content-type" content="text/html; charset=utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1">

      <style type="text/css">
        @import url('https://fonts.googleapis.com/css?family=Overpass+Mono');
        body, table, td, a{-webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%;} /* Prevent WebKit and Windows mobile changing default text sizes */
          table {border-collapse:collapse;}
        table, td{mso-table-lspace: 0pt; mso-table-rspace: 0pt;} /* Remove spacing between tables in Outlook 2007 and up */
        img{-ms-interpolation-mode: bicubic;} /* Allow smoother rendering of resized image in Internet Explorer */
        /* RESET STYLES */
        img{border: 0; height: auto; line-height: 100%; outline: none; text-decoration: none;}
        table{border-collapse: collapse !important;}
        body{height: 100% !important; margin: 0 !important; padding: 0 !important; width: 100% !important;}
        /* iOS BLUE LINKS */
        a[x-apple-data-detectors] {
          color: inherit !important;
          text-decoration: none !important;
          font-size: inherit !important;
          font-family: inherit !important;
          font-weight: inherit !important;
          line-height: inherit !important;
    <body style="margin: 0px !important; padding: 0px !important;">
      <table border="0" cellpadding="0" cellspacing="0" style="margin: 10px; max-width: 600px;">
            <td style="mso-padding-alt: 0px; padding: 0px 0px 10px 0px;">
              <a href="http://honestfox.com.au" style="text-decoration: none; color: #000000; display: block;" target="_blank">
                <img src="https://s3-ap-southeast-2.amazonaws.com/honest-fox-signatures/v1/logo.png" alt="Honest Fox" style="width: 30px;">
            <td style="background-color:#333; color: #000000; font-family: 'Overpass Mono', monospace; mso-padding-alt: 0px 0px 0px 0px; padding: 0px 0px 0px 0px; font-size: 16px; mso-line-height-rule:exactly; line-height: 20px; letter-spacing: 1px;">
              Xavian Ang
            <td style="background-color:#d4d4d4; font-family: 'Overpass Mono', monospace; mso-padding-alt: 0px; padding: 0px 0px 15px 0px; font-size: 10px; mso-line-height-rule:exactly; line-height: 13px; letter-spacing: 1px;">
              <span style="background-color:#000; color: #F05E45;">Web Developer</span><br>
              <span style="color: #000000;">0478 049 069</span>
            <td style="font-family: 'Overpass Mono', monospace; font-size: 8px; mso-line-height-rule:exactly; line-height: 10px; mso-padding-alt: 0px; padding: 0px 0px 15px 0px;">
              honest fox<br>
              level 3, 48 Easey St, Collingwood, VIC <br>
              <a href="http://honestfox.com.au" style="text-decoration: none; color: #000000;" target="_blank">honestfox.com.au</a>
            <td style="mso-padding-alt: 0px; padding: 0px;">
              <a href="https://www.facebook.com/honest.fox.creative/" style="text-decoration: none; color: #000000;" target="_blank">
                <img src="https://s3-ap-southeast-2.amazonaws.com/honest-fox-signatures/v1/icon-facebook.jpg" alt="Honest Fox" style="width: 18px;">