Meant to be run on a Raspberry Pi to email the current IP address to yourself. Note that this uses unauthenticated SMTP and only works in certain circumstances. This lets you run a headless pi that you can ssh in to.

mailip.py

import smtplib
import subprocess

my_email = 'myemail@gmail.com'
to_email = 'myemail@gmail.com'

myip = subprocess.check_output(['hostname', '-I'])

msg = ("From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n") % (my_email, to_email, "IP from the Pi")

msg = msg + "MY IP is " + myip
s = smtplib.SMTP('outgoing.mit.edu')
s.sendmail(my_email, [to_email], msg)
s.quit()