• Extension name: firestore-send-email
• Extension version: latest

Describe the problem

Steps to reproduce:

I have tried to send an email with the following headers via the firestore documet

 "headers": { "X-SMTPAPI": "{\"category\": [\"Example Category\"]}" } 

but i dont see the categories in sendGrid

is there any other option to send category to their side?

Expected result

Send grid will be able to get categories

Actual result

could not categirieze emails