How to connect Constant Contact to mailfloss
Getting started with cleaning your email lists with Constant Contact is easy with mailfloss. Once Constant Contact is connected, you can let mailfloss automatically clean your email lists with Constant Contact going forward. Here’s how to do that.
Step 1. Visit the integrations page
Visit the integrations page by clicking on “Integrations” in the left sidebar.

Step 2. Click the "Add integration" button

Step 3. Search for Constant Contact and click its logo

Step 4. Create a private app and paste its keys
Constant Contact requires your own private app. Follow the steps that mailfloss shows to create one in the Constant Contact V3 developer portal. Paste the app's API key into Client ID (API key), paste its client secret into Client Secret, and click Connect. mailfloss takes you to Constant Contact to approve access.

Step 5. Click the "Allow" button to authorize mailfloss
Once authorized you will be taken back to mailfloss.

For an overview of what mailfloss does for Constant Contact, see the Constant Contact integration page.