SendGrid Test by python smtplib

sendgrid-test.py

#!/usr/bin/env python3

import os
from smtplib import SMTP
from email.message import EmailMessage


def main():
    api_key = os.environ['api_key']
    # my addr -> spam, 'uso@dummy.ko' -> not spam
    from_addr = os.environ['from_addr']
    to_addrs = os.environ['to_addrs']

    with SMTP(host='smtp.sendgrid.net', port=587) as smtp:
        smtp.starttls()
        smtp.login('apikey', api_key)

        msg = EmailMessage()
        msg.set_content("Hello, World!")
        msg['Subject'] = 'Test Mail'
        msg['From'] = from_addr
        msg['To'] = to_addrs

        smtp.set_debuglevel(1)
        smtp.send_message(msg)


if __name__ == '__main__':
    main()