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Sending e-mails with Python

In all examples I am using a gmail server to send emails. If you are not using a gmail address you need to insert the respective smtp server and possibly the port.

  • Gmail: smtp.gmail.com, port 587
  • Hotmail: smtp.live.com, port 587
  • Outlook: smtp-mail.outlook.com, port 587

Very basic example

This is a very barebones example. No subject is added to the email.

import smtplib

sender = 'sender@gmail.com'
pwd = 'senderpassword'  # password for sender email
receiver = 'receiver@gmail.com'
msg = 'Hi there!'

server = smtplib.SMTP('smtp.gmail.com', 587)  # smtp server and port for the sender email
server.ehlo()
server.starttls()  # starts a TLS encrypted connection
server.login(sender, pwd)
server.sendmail(sender, receiver, msg)
server.close()

print('Mail sent!')

More complete case

This uses the Python email library to help compose the email. You can add the subject to the email.

import smtplib
from email.message import EmailMessage

sender = 'sender@gmail.com'
pwd = 'senderpassword'  # password for sender email
receiver = 'receiver@gmail.com'
message = 'Hi there!'

msg = EmailMessage()
msg.set_content(message)
msg['Subject'] = subject
msg['From'] = sender
msg['To'] = receiver

server = smtplib.SMTP('smtp.gmail.com', 587)
server.ehlo()
server.starttls()  # starts a TLS encrypted connection
server.login(sender, pwd)
server.sendmail(sender, receiver, msg.as_string())
server.close()

print('Mail sent!')

HTML email

Here’s an example of how to create an HTML message with an alternative plain text version.

import smtplib

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

# me == my email address
# you == recipient's email address
me = "my@email.com"
you = "your@email.com"

# Create message container - the correct MIME type is multipart/alternative.
msg = MIMEMultipart('alternative')
msg['Subject'] = "Link"
msg['From'] = me
msg['To'] = you

# Create the body of the message (a plain-text and an HTML version).
text = "Hi!\nHow are you?\nHere is the link you wanted:\nhttp://www.python.org"
html = """\
<html>
  <head></head>
  <body>
    <p>Hi!<br>
       How are you?<br>
       Here is the <a href="http://www.python.org">link</a> you wanted.
    </p>
  </body>
</html>
"""

# Record the MIME types of both parts - text/plain and text/html.
part1 = MIMEText(text, 'plain')
part2 = MIMEText(html, 'html')

# Attach parts into message container.
# According to RFC 2046, the last part of a multipart message, in this case
# the HTML message, is best and preferred.
msg.attach(part1)
msg.attach(part2)

# Send the message via local SMTP server.
s = smtplib.SMTP('localhost')
# sendmail function takes 3 arguments: sender's address, recipient's address
# and message to send - here it is sent as one string.
s.sendmail(me, you, msg.as_string())
s.quit()