This feature will allow you to instantly send all of your hard earned leads directly to your Constant Contact lists. After you've setup the connection, all "new" leads will be saved in both Instapage and to the Constant Contact list you selected.
In order to set this up on your page, click Settings and then Integrations;
Now select Constant Contact from the top menu;
Log in to your Constant Contact account;
This step is done once per sub-account (or once per account for Core and Optimizer subscribers). After you’ve signed in, you will only select the account from a list. On the same page, you can add a new Constant Contact account and disconnect the Constant Contact integration for the page. After you select the account, click Continue;
Now select which list you would like to use and click Continue;
Now just map all your Instapage fields to match the ones in Constant Contact;
That’s it. If you followed the steps correctly, your form submissions will be sent to Constant Contact automatically.
Note: Make sure to test the integration with different email addresses because if you submit the form multiple times with the same email address the integration will flag the email as a spam.