HI Everyone,

We are goign to blast an email, however I can't seem to get my preheader to stay hidden on Gmail and Yahoo. :(
Hope someone can help me! This is the code:

<!-- /// Begin Hidden Preheader -->
<table style="display:none; " border="0" cellpadding="0" cellspacing="0" width="600" id="preheader-table" ><tr ><td width="600" id="preheader-table-cell" ><span id="preheader" class="mktEditable" style="display:none; max-height: 0px; font-size: 0px; overflow: hidden; mso-hide: all; color:#f0f0f5;">{{my.email-intro}}</span>
    </td>
  </tr>
</table>
<!-- End Hidden Preheader ||| -->

I also tried it by putting it in a div:

<!-- /// Begin Hidden Preheader -->
<table style="display:none;" border="0" cellpadding="0" cellspacing="0" width="600" id="preheader-table"><tr><td width="600" id="preheader-table-cell"><div id="preheader" class="mktEditable" ><span style="float:left; display:none; line-height:0px; max-height: 0px; font-size: 0px; overflow: hidden; mso-hide: all; color:#f0f0f5;">{{my.email-intro}}</span></div>
</td>
</tr>
</table>
<!-- End Hidden Preheader ||| -->