域名过期了网站会怎么样

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

def check_domain_expiration(domain, email):
    try:
        answers = dns.resolver.resolve(domain, 'SOA')
        for rdata in answers:
            expiration_date = rdata.refresh
            current_date = datetime.now()
            days_until_expiration = (expiration_date - current_date).days
            if days_until_expiration < 30:
                send_reminder_email(email, domain, days_until_expiration)
    except Exception as e:
        print(f"Error checking domain {domain}: {e}")

def send_reminder_email(email, domain, days_until_expiration):
    msg = MIMEText(f"Domain {domain} will expire in {days_until_expiration} days. Please renew it.")
    msg['Subject'] = 'Domain Expiration Reminder'
    msg['From'] = 'your_email@example.com'
    msg['To'] = email

    smtp_server = smtplib.SMTP('smtp.example.com', 587)
    smtp_server.login('your_email@example.com', 'your_password')
    smtp_server.sendmail('your_email@example.com', email, msg.as_string())
    smtp_server.quit()

# Example usage
check_domain_expiration('example.com', 'admin@example.com')