#import smtp library
import smtplib

#define connection parameters
source = 'user1@gmail.com'
dest  = 'user2@gmail.com'


#define message
word = "\r\n".join([
  "source: user1@gmail.com",
  "To: user2@gmail.com",
  "Subject: Buenas dias",
  "",
  "Yo soy Pato"
  ])

#define the password for source
passw = 'xxxxxxxx'

#set the smtp server
server = smtplib.SMTP('smtp.gmail.com:587')

server.ehlo()
server.starttls()
server.login(source,passw)
server.sendmail(source, dest, word)
server.quit()