Make your Raspberry Pi email its local and external IPs to you on reboot.
Put the rpiips folder in /home/pi
Make python email script executable
sudo chmod +x /home/pi/rpiips/mail-ip
Make script run on reboot
sudo vi /etc/rc.local
Write the following before "exit 0"
# email ip address on reboot
python /home/pi/rpiips/mail-ip.py
You could put the rpiips folder other places than /home/pi but you will have to change mail-ip.py.