邮箱域名检查

import dns.resolver

def check_domain(domain):
    try:
        answers = dns.resolver.resolve(domain, 'MX')
        if answers:
            return True, answers
        else:
            return False, "MX record not found"
    except dns.resolver.NXDOMAIN:
        return False, "Domain does not exist"

domain = "example.com"
result, message = check_domain(domain)
print(result, message)

import smtplib

def check_smtp(domain):
    try:
        smtp_server = smtplib.SMTP(timeout=10)
        smtp_server.connect(domain, 25)
        smtp_server.quit()
        return True, "SMTP server is responsive"
    except smtplib.SMTPConnectError:
        return False, "SMTP server not responding"

domain = "example.com"
result, message = check_smtp(domain)
print(result, message)

def check_blacklist(domain):
    blacklists = ["spamhaus.org", "sbl.spamhaus.org"]
    for blacklist in blacklists:
        try:
            response = dns.resolver.resolve(f"{domain}.{blacklist}", 'A')
            if response:
                return False, f"Domain is listed on {blacklist}"
        except dns.resolver.NXDOMAIN:
            continue
    return True, "Domain is not listed on any known blacklists"

domain = "example.com"
result, message = check_blacklist(domain)
print(result, message)