How to send email through MailChimp 3.0 api?

Question

I\'m trying to send email through mailchimp api version 3.0 in php, but i have no luck. This is my code:

$postString = \'{
        \"message\": {
            \"h         


        

Answer 1

You cannot send a random email from API v3 like you probably did with v1. Now you can only send a previously created campaign in MailChimp as stated by LamaDelRay.