Simple Mail Sender

#!/usr/bin/env python2
# Just simply send an email with out having own SMTP server.
# It searches the first available on the internet
# nice isn't it? :)
#
from sys import argv
from email.mime.text import MIMEText
import smtplib
from DNS.lazy import mxlookup

if len(argv) != 5:
  print("Usage : " + argv[0] +" FROM TO SUBJECT MESSAGE")
  print(" FROM is the email address to send from")
  print(" TO is the email address to send to")
  print(" SUBJECT is the email's subject")
  print(" MESSAGE is the message to send")
else:
  msg = MIMEText(argv[4])
  msg['Subject'] = argv[3]
  msg['To'] = argv[2]
  msg['From'] = argv[1]
  try:
    server = mxlookup(argv[2].split('@')[1])[0][1]
  except:
    print("Error : Could not get an MX record.")
    exit(1)
  print("Connecting to " + server)
  s = smtplib.SMTP(server)
  d = s.sendmail(argv[1], [argv[2]], msg.as_string())
  if len(d) == 0:
    print("Email sent successfully")
  else:
    print("Error occured while sending : " + repr(d))
  s.quit()
  exit(0)