Web Fonts in Email

Web Safe Fonts

Helvetica, sans-serif;
Arial, sans-serif;
Verdana, sans-serif;
Times New Roman, serif;
Times, serif;
Georgia, serif;

Adding a Web Font to Email

<table cellpadding="0" cellspacing="0" border="0" width="100%">
    <td align="left" valign="top" style="font-family:'Coda', Arial, Helvetica, sans-serif; font-size:12px; mso-line-height-rule:exactly; line-height:20px; color:#58595b; padding:10px 20px 10px 20px;" bgcolor="#ffffff"><strong>Content</strong></td>

Meta (Place directly above the opening <style> of the css)

<!--[if !mso]><!-->
<link href="https://fonts.googleapis.com/css?family=Coda" rel="stylesheet">