Remove blank image from email template footer

Please follow the steps below to remove the blank image: 

1. Log in to the Marketing Cloud application
2. Go to Setup | Company Settings.
3. Click the Account Settings selection (from left-hand menu).
4. Click the Edit button (available on top of the pane). 
5. Go to the Headers and Footers section. 
6. Select the Custom radio dial for HTML Footer (this will allow you to have your own footer).
7. Click the Insert Recommended Footer button available at the bottom of the section. 

Step 7 will insert HTML code for your use, which is a default code for the Marketing Cloud footer.

You can now see the code that produces the blank image and remove it from the footer.

Below is the code for your reference:

Please ensure this complete section of code is removed.

<!-- SALESFORCE MARKETING CLOUD IMAGE -->

  <tr>

    <td bgcolor="#FFFFFF">

    <table cellpadding="0" cellspacing="0" border="0" width="100%" align="center">

      <tr>

        <td align="center">

        <table class="container" cellpadding="0" cellspacing="0" border="0" width="550">

          <tr>

            <td align="center"><img border="0" style="display:block" src="http://www.exacttarget.com/images/Powered_By_1206.jpg" alt="Salesforce MC" name="Salesforce MC" width="124" height="56"></td>

          </tr>

        </table>

        </td>

      </tr>

    </table>

    </td>

  </tr>

Once removed, save the settings from the top of the page and this will remove the blank image from the footer.