将email.Message对象保存到文件中

import email
import smtplib
import os
from email.mime.text import MIMEText

# 创建email.Message对象
msg = MIMEText('Hello, this is a test email.')
msg['Subject'] = 'Test Email'
msg['From'] = 'sender@example.com'
msg['To'] = 'recipient@example.com'

# 将email.Message对象保存到文件中
filename = 'test_email.eml'
with open(filename, 'wb') as f:
    f.write(msg.as_bytes())

# 发送email.Message对象
smtp_server = 'smtp.example.com'
smtp_port = 587
smtp_username = 'username'
smtp_password = 'password'

with smtplib.SMTP(smtp_server, smtp_port) as server:
    server.starttls()
    server.login(smtp_username, smtp_password)
    server.send_message(msg)