<!DOCTYPE html>
<html>

  <head>
    <script data-require="jquery@*" data-semver="2.0.3" src="//code.jquery.com/jquery-2.0.3.min.js"></script>

    <script>
      function addMailIframe() {
        $('<iframe src="mailto:your@email.address?subject=Comments about the color blue">')
           .appendTo('#myIframe')
           .css("display", "none");
      }

      function addMailIframeSrcdoc() {
        //var body   = "<a href='mailto:your@email.address?subject=Comments about the color blue'>Contact us</a>";
        var body   = "";
        var script = "<scr" + "ipt>" + "window.top.location = 'mailto:your@email.address?subject=Comments about the color blue';" + "</scr" + "ipt>";
        $(`<iframe srcdoc="` + script + body + `">`)
           .appendTo('#myIframeSrcdoc')
           .css("display", "none")
           ;
      }
    </script>
  </head>

  <body>
    <h1>Mailto</h1>

    The first approach - using &lt;a href&gt; - is the simplest one but you sometimes have to deal with JavaScript instead of mere hyperlink.
    Here are 3 other solutions to <strong>mailto</strong> issues.
    
    <h2>Link</h2>
    <!-- <a href="mailto:your@email.address?subject=Comments about the color blue">Contact Us</a> -->
    <a target="_top" href="mailto:your@email.address?subject=Comments about the color blue">Contact Us</a>
    
    <h2>window.open</h2>
    <input type="button" onclick="window.open('mailto:your@email.address?subject=Comments about the color blue');" value="Contact us" />
    
    <h2>Location href</h2>
    <input type="button" onclick="window.location.href='mailto:your@email.address?subject=Comments about the color blue';" value="Contact us" />
    
    <h2>(jQuery and) iFrame</h2>
    <input type="button" onclick="addMailIframe();" value="Contact us" />
    <div id="myIframe"></div>
    
    <h2>(jQuery,) iFrame <a href="http://caniuse.com/#feat=iframe-srcdoc">srcdoc</a> and window.top.location</h2>
    <input type="button" onclick="addMailIframeSrcdoc();" value="Contact us" />
    <div id="myIframeSrcdoc"></div>

  </body>

</html>