email-to-sms.py

#!/usr/bin/python2

import email
import sys
import re
import shutil
import uuid

allowed = [
        "sender@gmail.com",
        ]

mail = email.message_from_file(sys.stdin)

to = mail["delivered-to"]
msgid = mail["message-id"]
text = "unable to decode email"
sender_name,sender = email.utils.parseaddr(mail["from"])

if sender not in allowed:
    raise Exception("Sender '"+sender+"' not allowed!")

if mail.is_multipart():
    for part in mail.walk():
        ctype = part.get_content_type()
        if ctype == 'text/plain':
            text = part.get_payload(decode=True)  # decode
else:
    text = mail.get_payload(decode=True)

m = re.match(r"sms\+([0-9]+)@", to)
number = m.group(1)

filename = str(uuid.uuid1()) + ".sms"

sms = open(filename,"w") 
sms.write("To: +"+number+"\n") 
sms.write("\n") 
sms.write(text)
sms.close()

shutil.move(filename, "/var/spool/sms/outgoing/"+filename)