python 2.4 中的服务器不支持 SMTP AUTH 扩展

在早期版本的Python中，如Python 2.4，服务器并不支持SMTP AUTH扩展。SMTP AUTH是一种用于通过身份验证发送电子邮件的机制，它可以确保邮件的发送者是合法的用户。然而，在Python 2.4中，由于服务器的限制，无法使用SMTP AUTH功能。本文将介绍SMTP AUTH扩展的作用以及如何在较新版本的Python中使用它。

python
import smtplib
from email.mime.text import MIMEText
def send_email():
    # 设置发件人、收件人和邮件内容
    sender = 'your_email@example.com'
    receiver = 'recipient@example.com'
    subject = 'Hello from Python!'
    message = 'This is a test email sent from Python.'
    # 创建邮件对象
    msg = MIMEText(message)
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = receiver
    try:
        # 连接到SMTP服务器
        server = smtplib.SMTP('smtp.example.com', 587)
        
        # 登录到SMTP服务器（使用用户名和密码）
        server.login('username', 'password')
        
        # 发送邮件
        server.sendmail(sender, receiver, msg.as_string())
        print('Email sent successfully!')
    except Exception as e:
        print('An error occurred while sending the email:', str(e))
    finally:
        # 关闭连接
        server.quit()
if __name__ == '__main__':
    send_email()

python
import smtplib
from email.message import EmailMessage
def send_email():
    # 设置发件人、收件人和邮件内容
    sender = 'your_email@example.com'
    receiver = 'recipient@example.com'
    subject = 'Hello from Python!'
    message = 'This is a test email sent from Python.'
    # 创建邮件对象
    msg = EmailMessage()
    msg['Subject'] = subject
    msg['From'] = sender
    msg['To'] = receiver
    msg.set_content(message)
    try:
        # 连接到SMTP服务器
        with smtplib.SMTP('smtp.example.com', 587) as server:
            # 登录到SMTP服务器（使用用户名和密码）
            server.login('username', 'password')
            
            # 发送邮件
            server.send_message(msg)
            print('Email sent successfully!')
    except Exception as e:
        print('An error occurred while sending the email:', str(e))
if __name__ == '__main__':
    send_email()