import subprocess
import smtplib
import socket
from email.mime.text import MIMEText
import datetime

to = 'email@domain.com'
email_username = 'test@gmail.com'
email_password = 'password'

# Establish SMTP session
smtpserver = smtplib.SMTP('smtp.gmail.com', 587)
smtpserver.ehlo()
smtpserver.starttls()
smtpserver.ehlo
smtpserver.login(email_username, email_password)
today = datetime.date.today()

# Get public ipv4 address
arg='ip route list'
p=subprocess.Popen(arg,shell=True,stdout=subprocess.PIPE)
data = p.communicate()
split_data = data[0].split()
ipaddr = split_data[split_data.index('src')+1]
my_ip = 'Your ip is %s' %  ipaddr

# Create email message
msg = MIMEText(my_ip)
msg['Subject'] = 'IP For RaspberryPi on %s' % today.strftime('%b %d %Y')
msg['From'] = email_username
msg['To'] = to

# Send mail via SMTP session and then close session
smtpserver.sendmail(email_username, [to], msg.as_string())
smtpserver.quit()