邮件服务器修改域名

import dns.resolver

def update_dns_record(domain, new_mx_record):
    try:
        # 查询当前MX记录
        answers = dns.resolver.resolve(domain, 'MX')
        for rdata in answers:
            print(f"Current MX record: {rdata.exchange}")
        
        # 更新MX记录
        update = dns.update.Update(domain)
        update.replace('MX', 10, 'IN', new_mx_record)
        response = dns.query.tcp(update, 'your_dns_server_ip')
        
        if response.rcode() == 0:
            print("DNS record updated successfully")
        else:
            print(f"Failed to update DNS record, error code: {response.rcode()}")
    except dns.resolver.NXDOMAIN:
        print(f"Domain {domain} does not exist")
    except dns.resolver.NoAnswer:
        print(f"No MX record found for domain {domain}")
    except dns.resolver.Timeout:
        print(f"DNS query timed out")

# 示例调用
update_dns_record('example.com', 'mail.newexample.com')