Tracking property force

If you include the pixel property to add a tracking pixel to your responsive email, you may find yourself in a position that the pixel was left out of your email after all!

This happens if your email holds other images as well. The ResponsiveEmail.com service assumes that you add tracking variables to all the images in your email, and that the tracking pixel is only necessary if your email does not contain any images at all. If you want to turn off this behavior, and want to include the tracking pixel no matter the number of other images in the mail, you can use the force property.

{
    "name" : "template13",
    "subject" : "This email is being tracked by the NSA",
    "from" : "info@example.com",
    "tracking" : {
        "pixel" : "http://www.prism.gov/images/pixel.gif",
        "force" : true
    }
}