sendmail.py

import sys
import telnetlib


if __name__ == "__main__":
    mail = {
        "from": sys.argv[1],
        "to": sys.argv[2],
        "subject": sys.argv[3],
        "msg": sys.argv[4]
    }

    tn = telnetlib.Telnet()
    tn.open("localhost", 25)
    print tn.read_some()

    cmds = [
        "ehlo localhost",
        "mail from: %s" % (mail["from"],),
        "rcpt to: %s" % (mail["to"],),
        "data",
        "Subject: %s\n%s\n." % (mail["subject"], mail["msg"]),
        "quit"
    ]

    for cmd in cmds:
        tn.write(cmd + "\n")
        print tn.read_some()