我正在使用 python 发送带有 HTML 正文和附件的电子邮件。我还想为不显示 HTML 的电子邮件客户端包含一个纯文本电子邮件正文。下面我的应用程序的代码示例似乎在很多情况下都有效，但我注意到在 IOS 电子邮件客户端中没有出现附件。
如果我只是以 HTML 格式发送电子邮件，那么一切似乎都有效，但如果可能的话，我想提供一个替代的纯文本正文。我的代码中是否缺少任何正确发送 HTML 和纯文本电子邮件正文的内容。
非常感谢任何建议。
import smtplib
import ssl
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication
# Mail server settings
MAIL_SMTP_SERVER = "smtp.gmail.com"
MAIL_PORT = 465
MAIL_USERNAME = '***'
MAIL_PASSWORD = '***'
email_to = '*@***.com'
email_from = '#@###.com'
email_subject = 'Email test'
email_body_html = '''
<html>
<body>
<h1>Email Body</h1>
<p>Here is some text</p>
</body>
</html>
'''
email_body_plaintext = 'This is the plain text body'
path='./test_doc.pdf'
name='doc.pdf'
# Create the message
mime_message = MIMEMultipart('alternative')
mime_message["From"] = email_from
mime_message["To"] = email_to
mime_message["Subject"] = email_subject
# Add file attachment to the message
with open(path, "rb") as file_to_read:
file_attachment = MIMEApplication(file_to_read.read())
file_attachment.add_header("Content-Disposition", f"attachment; filename= {name}")
mime_message.attach(file_attachment)
# Attach the plain text body
mime_message.attach(MIMEText(email_body_plaintext, "plain"))
# Attach the HTML body
mime_message.attach(MIMEText(email_body_html, "html"))
# Get the mime message into string format
email_string = mime_message.as_string()
# Connect to the SMTP server and Send Email
context = ssl.create_default_context()
with smtplib.SMTP_SSL(MAIL_SMTP_SERVER, MAIL_PORT, context=context) as server:
server.login(MAIL_USERNAME, MAIL_PASSWORD)
server.sendmail(email_from, email_to, email_string)
multipart/alternativemultipart/mixedmultipart/alternativetext/plaintext/htmlapplication/pdf