This assume you are already familiar with sending a basic sendgrid email template using Python. If not, check out my article Sending email using Python.

Here is an example of how to send to multple recipients. This is just the boilerplate code, no error handling, just to focus on the most important markup.

#!/usr/bin/python3
import base64
import os
from sendgrid import SendGridAPIClient
from sendgrid.helpers.mail import (Mail, To)

message = Mail(
    from_email='from@example.com',
    to_emails=[To('john.doe@example.com'), To('jane.doe@example.com')]
    subject='hey',
    html_content='Hello <strong>World</strong>')

sg = SendGridAPIClient('YOUR API KEY')
response = sg.send(message)

print(f"response.status_code = {response.status_code}")
print(f"response.body        = {response.body}")
print(f"response.headers     = {response.headers}")