Using PHP Curl and Mailgun API to send mail with attachment using remote file

Question

I\'m using the Google App Engine (GAE) for PHP, and I\'m trying to use the Mailgun API to send a message with an attachment using CURL.

The attachment is on Google Clou

Answer 1

First, make sure you run PHP 5.5, because curl_file_create() is only supported from PHP 5.5.

Then, try to get rid of setting headers explicitly. When the value of CURLOPT_POSTFIELDS is an array, then Curl automatically sets a header for multipart/form-data. So, get rid of this:

curl_setopt($cl, CURLOPT_HTTPHEADER, $headers_arr);