如何在python中验证域的MX记录？

pip install dnspython

import dns.resolver

def check_mx_records(domain):
    try:
        mx_records = dns.resolver.query(domain, 'MX')
        for record in mx_records:
            print(f"MX Record: {record.exchange} (Priority: {record.preference})")
    except dns.resolver.NoAnswer:
        print("No MX records found for this domain.")
    except dns.resolver.NXDOMAIN:
        print("Domain does not exist.")

domain = "example.com"
check_mx_records(domain)