smtp.py

import smtplib

session = smtplib.SMTP('smtp.gmail.com', 587)
session.starttls()
session.login("username", "password")
subject = "Subject"
headers = ("From: {fromaddress}\n"
           "To: {toaddress}\n"
           "Subject: {subject}\n"
           "mime-version: 1.0\n"
           "content-type: text").format(fromaddress="from",
                                        subject=subject,
                                        toaddress="to")

body = "body"
content = headers + "\n\n" + body
session.sendmail("from", "to", content)
session.close()