API

hello
I have just moved to clouways and have setup with Elastic Email for sending from my wordpress site.
The site has gravity forms, which is working fine and also using gravity PDF.

I believe the form setup is fine, along with gravity PDF, and Clouldways/Elastic Email is removing the attached PDF.

What i need help with is finding the following…

Cloudways has asked if i can share “the full API call that is used for sending emails from the plugin which is attaching the PDF”

I spoke with gravity forms and they said your plugin hooks in to the wp_mail function, are their any API calls from your plugin to send the mail?