Cannot include custom font into emails
<p>First of all I'm sending email to number of customers that maybe gonna be like 16,000 mails and unfortunately I found issue in my custom font. I can't load it into my mail page. I tried this:</p>

<ol><li>With link tag in HTML<pre>&lt;link href='https://fonts.googleapis.com/css?family=Droid%20Arabic%20Kufi' rel='stylesheet' type='text/css'>
</pre></li><li>With <code>@font-face</code> in css:<pre>@font-face {
    font-family: 'Droid Arabic Kufi';
    font-style: normal;
    font-weight: 400;
    src: url(https://fonts.gstatic.com/ea/droidarabickufi/v6/DroidKufi-Regular.eot);
    src: url(https://fonts.gstatic.com/ea/droidarabickufi/v6/DroidKufi-Regular.eot?#iefix) format('embedded-opentype'),
         url(https://fonts.gstatic.com/ea/droidarabickufi/v6/DroidKufi-Regular.woff2) format('woff2'),
         url(https://fonts.gstatic.com/ea/droidarabickufi/v6/DroidKufi-Regular.woff) format('woff'),
         url(https://fonts.gstatic.com/ea/droidarabickufi/v6/DroidKufi-Regular.ttf) format('truetype');
}</pre></li><li>With <code>@import</code><pre>@import url(http://fonts.googleapis.com/earlyaccess/droidarabickufi.css);
</pre></li>
</ol>

<p>Don't tell me make it images because I can't and the reason is the mail form gonna be generated via PHP.</p>

<p>Any help will be appreciated thanks a lot.  </p>