pythonでHTMLメールを送信する

更新日：2019年4月14日

pythonでHTMLメールを送信する実装をシェアします。

Sample Code

#! /usr/bin/env python
# -*- coding: utf-8 -*-

import smtplib

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

me = "xxx@xxx.xxx"  # 送信元メールアドレス
you = "xxx@xxx.xxx"  # 送信先メールアドレス

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

# Create the body of the message (a plain-text and an HTML version).
text = "This is a test message.\nText and html.\nfor Text"
html = """\
<html>
  <head></head>
  <body>
    <p style='font-size:16.0pt;font-family:游ゴシック'>This is a test message.</p>
    <p>Text and HTML</p>
    <p>for HTML</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()

Point 1

MIMEMultipartに’alternative’を設定

msg = MIMEMultipart('alternative')

Point 2

以下にhtmlを実装する。

html = """\
<html>
  <head></head>
  <body>
    <p style='font-size:16.0pt;font-family:游ゴシック'>This is a test message.</p>
    <p>Text and HTML</p>
    <p>for HTML</p>
  </body>
</html>
"""

Point 3

HTML（Plainも）をmsgにattachする。

# the HTML message, is best and preferred.
msg.attach(part1)
msg.attach(part2)

実行結果

メール受信した結果です。
HTML形式で送信できています。