在Windows上使用Python发送电子邮件的示例代码

本示例代码演示了如何在Windows上使用Python编写电子邮件客户端程序，并发送电子邮件。实现方式是使用Python内置的smtplib库进行SMTP邮件发送，并使用Python内置的email.mime.multipart和email.mime.base64库组合邮件内容和附件。

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.mime.text import MIMEText
from email.utils import COMMASPACE
from email import encoders

SERVER = "smtp.gmail.com"
PORT = 587
USERNAME = "myemail@gmail.com" # 发件人邮箱账号
PASSWORD = "mypassword" # 发件人邮箱密码

# 邮件基本信息
FROM = "myemail@gmail.com" # 发件人邮箱
TO = ['recipient1@example.com', 'recipient2@example.com'] # 收件人邮箱列表
SUBJECT = "电子邮件主题"
BODY = "电子邮件正文"

msg = MIMEMultipart()
msg['From'] = FROM
msg['To'] = COMMASPACE.join(TO)
msg['Subject'] = SUBJECT
msg.attach(MIMEText(BODY))

# 添加附件
attachment = open('attachment.txt', "rb")
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" % 'attachment.txt')
msg.attach(part)

# 发送电子邮件
server = smtplib.SMTP(SERVER, PORT)
server.ehlo()
server.starttls()
server.login(USERNAME, PASSWORD)
server.sendmail(FROM, TO, msg.as_string())
server.quit()

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