Post request from different domain CORS error - Netlify functions

I have never had success in sending a POST request from a different domain to my https://* . I have allowed the headers as below, but still no luck.

const headers = {
    'Access-Control-Allow-Origin': '*',
    'Access-Control-Allow-Headers': 'Content-Type',
    'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE'

return {
        statusCode: 200, 
        body: JSON.stringify({message:'Successfully updated the post!'})

However, if I run at Local with netlify-cli, it works fine. e.g test-domain.test to localhost:8888/.netlify/functions/post-route (netlify functions)

Does Netlify prevent post/put/delete requests from different domain?

@poeeain I suspect you’re missing values necessary for it to adequately handle the Preflight request.

I found someone reporting success calling from Webflow with their code here: