Using Email Analytics with Constant Contact
Constant Contact does not allow editing of their default templates, so Litmus Email Analytics codes can only be used if you are have a custom code template built with your own HTML.
Constant Contact does not have an available subscriber ID but does provide a guide on dynamic links - their term for parameters. You can create an anonymous subscriber ID for your contacts and it can be included in your Litmus tracking code.
Set up your Litmus tracking code
In Litmus, select the Analytics tab in the top menu, choose Tracking code manager in the left menu pane, and then set up your tracking code.
Select Constant Contact as your ESP and include your custom subscriber ID in the merge tag field. Be sure to include the required delimiters [[custom.your-parameter-name]]
Customize your tracking code with date range, additional custom parameters, and analytics tags as needed. When finished, hover over the code block and Click to copy your tracking code's HTML.
Copy and paste the tracking code from Litmus into your Constant Contact HTML template. While we recommend placing the tracking code by the closing </body> tag of your email, or as close to the bottom of your template as possible, it can be placed anywhere between the <body> tags.