What is the correct way to postmessage?

Works → top.frames[i].postMessage(json, ‘https://d3h0owdjgzys62.cloudfront.net’);
Does not work → top.frames[i].postMessage(json, ‘https://*.cloudfront.net’);

I assume https://d3h0owdjgzys62.cloudfront.net will change.

top.frames[i].postMessage(json, ‘*’); is not allowed do to security reasons.

Hello @jiwyatt_cisco.com

Can you add a little more context to this

Which product?
Which API?

You can reference with the documentation or code snippet