smtpfile

#!/usr/bin/env python

# most code from http://docs.python.org/library/email-examples.html, but ported to work on python 2.6.
# Original script Copyright 2001-2010 Python Software Foundation; All Rights Reserved
# Modifications Copyright 2011 Eric Stein
# Modded to simply send one file by Eric Stein http://cons.truct.org
# Licensed GPL2

import smtplib
import mimetypes
import os
import re
import sys
import dns.resolver

from email import encoders
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.message import Message

em_matcher = re.compile('^(.*)@(.*)$')

em_attach = sys.argv[1]
em_from = sys.argv[2]
em_to = sys.argv[3]
smtp_server = sys.argv[4]
if smtp_server == 'autoselect' :
	try :
		for x in dns.resolver.query(to_domain, 'MX') :
			smtp_server = x.to_text().split(' ')[1]
	except :
		print 'failed to look up the mx... [x]'
		sys.exit(1)

if not em_matcher.match(em_from) :
	raise RuntimeError("bad email from address")

matched = em_matcher.match(em_to)
if not matched :
	raise RuntimeError("bad email to address")

trash, to_domain = matched.groups()

outer = MIMEMultipart()
outer['To'] = em_to
outer['From'] = em_from
outer.preamble = 'MIME file attached..\n'

if not os.path.isfile(em_attach) :
	raise RuntimeError("%s is not a file" % em_attach)

ctype, encoding = mimetypes.guess_type(em_attach)
if ctype is None or encoding is not None:
	# No guess could be made, or the file is encoded (compressed), so
	# use a generic bag-of-bits type.
	ctype = 'application/octet-stream'
maintype, subtype = ctype.split('/', 1)
fp = open(em_attach, 'rb')
msg = MIMEBase(maintype, subtype)
msg.set_payload(fp.read())
fp.close()
encoders.encode_base64(msg)

msg.add_header('Content-Disposition', 'attachment', filename=em_attach)
outer.attach(msg)

composed = outer.as_string()

s = smtplib.SMTP()
s.connect(smtp_server)
s.sendmail(em_from, em_to, composed)
s.quit()