Automatically Send an email using Python's smtplib

send_mail_with_smtplib.py

import smtplib
import ssl
from smtplib import SMTPAuthenticationError

# Simple Python snippet to automatically send emails using gmail
# Docs: https://docs.python.org/3.10/library/smtplib.html

DEFAULT_SSL_PORT = 465
GMAIL_SERVER_ADDRESS = "smtp.gmail.com"
DEFAULT_SENDER_EMAIL_ADDRESS = "<sender-address>"
password = input("Sender password: ")

email_body = "Hello world"
# Create a secure SSL context
context = ssl.create_default_context()

with smtplib.SMTP_SSL(GMAIL_SERVER_ADDRESS, DEFAULT_SSL_PORT, context=context) as server:
    exception_instance = server.login(DEFAULT_SENDER_EMAIL_ADDRESS, password)
    if exception_instance is not None:  # type: SMTPAuthenticationError
        print(exception_instance)
        raise exception_instance

    server.sendmail(from_addr=DEFAULT_SENDER_EMAIL_ADDRESS, to_addrs="<recipients>", msg=email_body)