AWS LambdaでSESを使ってメールを送信

sendMailSes.py

import os
import smtplib
from email.mime.text import MIMEText

def lambda_handler(event, context):
    to_addr = event.get('to_addr')
    subject = event.get('subject')
    body = event.get('body')
    msg = MIMEText(body)
    msg['Subject'] = subject
    msg['From'] = os.environ['MAIL_ADDR_FROM']
    msg['To'] = to_addr
    s  = smtplib.SMTP(os.environ['MAIL_SMTP_ENDPOINT'], os.environ['MAIL_SMTP_PORT'])
    s.ehlo()
    s.starttls()
    s.login(os.environ['MAIL_LOGIN_ID'], os.environ['MAIL_LOGIN_PASS'])
    s.sendmail(os.environ['MAIL_ADDR_FROM'], to_addr, msg.as_string())
    s.close()