I am creating an email and below the header I am putting a thin gray line. Outlook 2016 is causing it to be supper thick. I have inserted the code below. Any help would be much appreciated. I thought the mso-line-height-rule would fix it, but it only worked for Outlook 2013.


<tr>
    <td align="center" height="100%" valign="top" width="100%" bgcolor="#ffffff" style="padding: 50px 15px 10px;" class="mobile-padding">
        <!--[if (gte mso 9)|(IE)]>
            <table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
            <tr>
            <td align="center" valign="top" width="600">
            <![endif]-->
        <table align="center" border="0" cellpadding="0" cellspacing="0" width="600" style="max-width:600px;">
            <tr>
                <td align="center" valign="top" style="padding: 0 0 25px 0; font-family: 'Whitney SSM A, Whitney SSm B';">
                    <table cellspacing="0" cellpadding="0" border="0" width="100%">
                        <tr>
                            <td align="center" bgcolor="#ffffff" style="border-radius: 3px 3px 0 0;">
                            </td>
                        </tr>
                        <tr>
                            <td align="center" bgcolor="#ffffff" style="border-radius: 0 0 3px 3px; padding: 25px;">
                                <table cellspacing="0" cellpadding="0" border="0" width="600">
                                    <tr>
                                        <td align="left" class="svg-fall" style="padding: 0 0 0 0;">
                                            <div class="no-webkit">
                                                <img src="https://www.lifepro.com/Portals/0/Images/Emails/Live Webinars/LP-Logo-Header.png" width="125" alt="LifePro" border="0">
                                            </div>
                                            <div class="is-webkit" style="font-size:1px;line-height:1px;color:#f6f6f6;display:none;height:0px;max-height:0px;">
                                                <img src="https://www.lifepro.com/Portals/0/Images/Emails/Live Webinars/LP Logo Header.svg" height="0" width="0" border="0"
                                                    alt="LifePro" onerror="this.onerror=null; this.src='https://www.lifepro.com/Portals/0/Images/Emails/Live Webinars/LP-Logo-Header.png'"
                                                    class="svg-header">
                                            </div>
                                        </td>
                                        <td width="100%" align="right" valign="middle" style="padding: 20px 0 0 0; font-family:'Whitney SSM A, Whitney SSm B'; font-size:15px; letter-spacing: .4px; line-height:16px; color:#003087; font-weight:bold;">
                                            LIVE WEBINARS
                                        </td>
                                    </tr>
                                    <tr><table width="600" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                        <td width="100%" height="20"></td>
                    </tr>
                </table></tr>
                                    <tr>
                                        <table width="600" border="0" cellspacing="0" cellpadding="0">
                    <tr>
                                        <td width="100%" height="2" align="center" bgcolor="#e0e0e0" style="line-height: 1%; mso-line-height-rule:exactly;">
                                        </td>
                                            </tr>
                                        </table>
                                    </tr>
                                    <tr>
                                        <td colspan="2" align="center" valign="top" style=" padding: 10px 0 0 0; font-family: 'Whitney SSM A, Whitney SSm B';">
                                            <h1 style="font-size: 44px; color: #003087;letter-spacing: -.5px;">
                                                <!--CHANGEME ME-->The Most Powerful Headline That Has Ever Been Seen</h1>
                                            <p style="color: #7c878e; font-size: 26px; line-height: 25px; margin: -10px 0 0 0;letter-spacing: -.5px;">
                                                <!--CHANGEME ME-->Amazing Description of Headline
                                            </p>
                                        </td>
                                    </tr>
                                </table>
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>
        </table>
    </td>
</tr>