如果你想要更简单的东西:

from redmail import EmailSender
email = EmailSender(host="smtp.myhost.com", port=1)

email.send(
    subject="Example email",
    sender="me@example.com",
    receivers=["you@example.com"],
    html="<h1>Hi, this is HTML body</h1>"
)

Pip从PyPI安装红色邮件:

pip install redmail

红色邮件几乎有所有你需要从发送电子邮件，它有很多功能，包括:

附件 模板化(使用Jinja) 嵌入式图像 他们的表 以抄送或密送方式发送 Gmail预配置

文档:https://red-mail.readthedocs.io/en/latest/index.html

源代码:https://github.com/Miksus/red-mail

下面是发送HTML电子邮件的简单方法，只需指定Content-Type头为'text/ HTML ':

import email.message
import smtplib

msg = email.message.Message()
msg['Subject'] = 'foo'
msg['From'] = 'sender@test.com'
msg['To'] = 'recipient@test.com'
msg.add_header('Content-Type','text/html')
msg.set_payload('Body of <b>message</b>')

# Send the message via local SMTP server.
s = smtplib.SMTP('localhost')
s.starttls()
s.login(email_login,
        email_passwd)
s.sendmail(msg['From'], [msg['To']], msg.as_string())
s.quit()

我在这里提供答案可能有点晚了，但是这个问题询问了一种发送HTML电子邮件的方法。使用像“email”这样的专用模块是可以的，但我们可以在不使用任何新模块的情况下实现相同的结果。这都归结为Gmail协议。

下面是我的简单示例代码，仅通过使用“smtplib”发送HTML邮件，而不使用其他任何代码。

```
import smtplib

FROM = "....@gmail.com"
TO = "another....@gmail.com"
SUBJECT= "Subject"
PWD = "thesecretkey"

TEXT="""
<h1>Hello</h1>
""" #Your Message (Even Supports HTML Directly)

message = f"Subject: {SUBJECT}\nFrom: {FROM}\nTo: {TO}\nContent-Type: text/html\n\n{TEXT}" #This is where the stuff happens

try:
    server=smtplib.SMTP("smtp.gmail.com",587)
    server.ehlo()
    server.starttls()
    server.login(FROM,PWD)
    server.sendmail(FROM,TO,message)
    server.close()
    print("Successfully sent the mail.")
except Exception as e:
    print("Failed to send the mail..", e)
```

你可以试试我的邮件模块。

from mailer import Mailer
from mailer import Message

message = Message(From="me@example.com",
                  To="you@example.com")
message.Subject = "An HTML Email"
message.Html = """<p>Hi!<br>
   How are you?<br>
   Here is the <a href="http://www.python.org">link</a> you wanted.</p>"""

sender = Mailer('smtp.example.com')
sender.send(message)

实际上，yagmail采取了一点不同的方法。

它将在默认情况下发送HTML，并为无法阅读电子邮件的用户提供自动回退功能。现在已经不是17世纪了。

当然，它可以被覆盖，但如下所示:

import yagmail
yag = yagmail.SMTP("me@example.com", "mypassword")

html_msg = """<p>Hi!<br>
              How are you?<br>
              Here is the <a href="http://www.python.org">link</a> you wanted.</p>"""

yag.send("to@example.com", "the subject", html_msg)

有关安装说明和更多伟大的功能，请查看github。

下面是一个工作示例，使用smtplib以及CC和BCC选项从Python发送纯文本和HTML电子邮件。

https://varunver.wordpress.com/2017/01/26/python-smtplib-send-plaintext-and-html-emails/

#!/usr/bin/env python
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

def send_mail(params, type_):
      email_subject = params['email_subject']
      email_from = "from_email@domain.com"
      email_to = params['email_to']
      email_cc = params.get('email_cc')
      email_bcc = params.get('email_bcc')
      email_body = params['email_body']

      msg = MIMEMultipart('alternative')
      msg['To'] = email_to
      msg['CC'] = email_cc
      msg['Subject'] = email_subject
      mt_html = MIMEText(email_body, type_)
      msg.attach(mt_html)

      server = smtplib.SMTP('YOUR_MAIL_SERVER.DOMAIN.COM')
      server.set_debuglevel(1)
      toaddrs = [email_to] + [email_cc] + [email_bcc]
      server.sendmail(email_from, toaddrs, msg.as_string())
      server.quit()

# Calling the mailer functions
params = {
    'email_to': 'to_email@domain.com',
    'email_cc': 'cc_email@domain.com',
    'email_bcc': 'bcc_email@domain.com',
    'email_subject': 'Test message from python library',
    'email_body': '<h1>Hello World</h1>'
}
for t in ['plain', 'html']:
    send_mail(params, t)