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April 9, 2025

May 13, 2026 5:49 pm

Capturing email addresses from third-party iframes in SFMC

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Understanding the Challenge

When a third-party iframe, like Attentive, is used to capture email addresses on a website, the parent page may not have direct access to the iframe’s events or data, including form submissions.

This limitation is due to the same-origin policy, which restricts a web page from accessing data from a different origin, such as a different domain, protocol, or port.

Exploring Alternatives

Before diving into the solution, it’s essential to understand the alternatives that were explored, including using event listeners or beacons to capture form submissions.

However, these approaches may not work due to the same-origin policy restrictions or the lack of access to the iframe’s backend code.

The root cause of this issue is the same-origin policy, which restricts access to data from a different origin, making it challenging to capture email addresses from third-party iframes.

Building a Custom Solution

To overcome this challenge, teams can use the Attentive API to build a custom form and capture email addresses before submitting them to Attentive.

This approach allows for more control over the form submission process and enables the capture of email addresses.

example.js

const attentiveApi = "https://api.attentive.io/";
const formData = {
  email: "[email protected]",
  phone: "1234567890"
};

fetch(attentiveApi, {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: JSON.stringify(formData)
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));

Heads up: Make sure to check the Attentive API documentation for the most up-to-date information on available endpoints and parameters.

Implementation Checklist

Getting Started with the Attentive API

  • Review the Attentive API documentation to understand available endpoints and parameters
  • Obtain an API key or access token to authenticate with the Attentive API
  • Build a custom form to capture email addresses and other relevant data
  • Use the Attentive API to submit the captured data to Attentive
  • Handle errors and exceptions that may occur during the API submission process
  • Test and validate the custom solution to ensure it meets the required functionality

Frequently Asked Questions

What is the Attentive API?

The Attentive API is a set of endpoints and parameters that allow developers to interact with the Attentive platform programmatically.

Do I need an API key or access token to use the Attentive API?

Yes, you need an API key or access token to authenticate with the Attentive API.

Can I use the Attentive API to capture email addresses from third-party iframes?

Yes, you can use the Attentive API to build a custom form and capture email addresses before submitting them to Attentive.

What are the benefits of using the Attentive API?

The benefits of using the Attentive API include more control over the form submission process, the ability to capture email addresses, and improved customization options.

Genetrix Technology · Salesforce Marketing Cloud Partner

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