邮箱域名检测是否存在

import dns.resolver

def check_domain(domain):
    try:
        mx_records = dns.resolver.resolve(domain, 'MX')
        if mx_records:
            return True
        else:
            return False
    except dns.resolver.NXDOMAIN:
        return False
    except dns.resolver.NoAnswer:
        return False
    except dns.resolver.Timeout:
        return False

# 示例调用
domain = "example.com"
if check_domain(domain):
    print(f"{domain} 存在且配置正确")
else:
    print(f"{domain} 不存在或配置错误")

import smtplib

def check_smtp(domain):
    try:
        smtp_server = smtplib.SMTP(timeout=10)
        smtp_server.connect(domain, 25)
        smtp_server.helo()
        smtp_server.mail('')
        code, message = smtp_server.rcpt('')
        smtp_server.quit()
        return code == 250
    except smtplib.SMTPConnectError:
        return False
    except smtplib.SMTPHeloError:
        return False
    except smtplib.SMTPSenderRefused:
        return False
    except smtplib.SMTPRecipientsRefused:
        return False
    except smtplib.SMTPDataError:
        return False
    except smtplib.SMTPException:
        return False

# 示例调用
domain = "mail.example.com"
if check_smtp(domain):
    print(f"{domain} SMTP 验证通过")
else:
    print(f"{domain} SMTP 验证失败")