#! /usr/bin/env python
# -*- coding: utf-8 -*-
import smtplib
from email.mime.text import MIMEText

def sendGmail(to, sub, body):
    username = "送信アドレス"
    msg = MIMEText(body)
    msg['Subject'] = sub
    msg['From'] = username
    msg['To'] = to
    smtp = smtplib.SMTP()
    smtp.connect()
    smtp.sendmail(username, to, msg.as_string())
    smtp.close()
if __name__ == '__main__':
    to = '宛先'
    sub = 'Python smtplib'
    body = 'Hello, Python'
    sendGmail(to, sub, body)