Property height

The height property is not normally used, because scaling and resizing the image can be best done with the width property. However, if you do supply a height property it will be used.

Using the height property in combination with width

If you set both the width and height properties, the ResponsiveEmail API will simply copy your height to the height HTML attribute, without any checking or calculations. Be aware that this will probably also mean that your image is going to be stretched, and that the ratio between the width and the height is going to be changed. Therefore, it is better not to set both the width and the height.

{
    "subject" : "Example email",
    "from" : "info@example.com",
    "blocks" : [ {
        "type" : "image",
        "src" : "http://www.example.com/logo.png",
        "width" : "33%",
        "height" : "400px"
    } ]
}

Using only the height property

If you only set the height property, the ResponsiveEmail.com library will download your image to find out the actual height. Based on the actual height, and your requested height, the new width of the image will be calculated. Setting the height property in the JSON is effectively the same as settig only the width with this calculated value.

An example. Imagine your image is 1000x600 pixels, and you specify the following input JSON:

{
    "subject" : "Example email",
    "from" : "info@example.com",
    "blocks" : [ {
        "type" : "image",
        "src" : "http://www.example.com/logo.png",
        "height" : "60px"
    } ]
}

The RepsonsiveEmail.com service will download your image, and find out the the real image size is 1000x600 pixels. The desired height is 60 pixels, so that the width should be set to 100 pixels to keep the same image ratio. The input JSON will thus be interpreted as identical to the following JSON:

{
    "subject" : "Example email",
    "from" : "info@example.com",
    "blocks" : [ {
        "type" : "image",
        "src" : "http://www.example.com/logo.png",
        "width" : "100px"
    } ]
}