Contact Form 7 & Constant Contact is a WordPress plugin by katzwebdesign that automatically add contact form submissions to Constant Contact lists that you choose! The plugin settings are configured on a per-form basis on the Contact Form 7 form configuration pages.
Add contacts to multiple lists at once
Sync form fields to Constant Contact fields, including your Custom Fields
Add a newsletter opt-in checkbox to your form (see plugin FAQs to learn how)
The plugin requires a Constant Contact account and the Contact Form 7 plugin (version 3.1 or later).