cn域名过期后不能再注册

import smtplib
from email.mime.text import MIMEText
from datetime import datetime, timedelta

def check_domain_expiration(domain, days_before_expiry=30):
    # 这里假设有一个函数可以获取域名的到期时间
    expiry_date = get_domain_expiry_date(domain)
    
    if expiry_date - datetime.now() <= timedelta(days=days_before_expiry):
        send_reminder_email(domain, expiry_date)

def send_reminder_email(domain, expiry_date):
    msg = MIMEText(f"域名 {domain} 将在 {expiry_date} 过期，请及时续费。")
    msg['Subject'] = f"域名 {domain} 即将过期提醒"
    msg['From'] = 'your_email@example.com'
    msg['To'] = 'recipient_email@example.com'

    smtp_server = 'smtp.example.com'
    smtp_port = 587
    smtp_username = 'your_email@example.com'
    smtp_password = 'your_email_password'

    with smtplib.SMTP(smtp_server, smtp_port) as server:
        server.starttls()
        server.login(smtp_username, smtp_password)
        server.sendmail(msg['From'], msg['To'], msg.as_string())

# 示例调用
check_domain_expiration('example.cn')