Email Security Check for m.twinmate.co.kr – SPF, DKIM, DMARC & SMTP

⚡ Live Data: Report generated fresh from authoritative registries. 🔄 Force Refresh

🤖 AI Intelligence Summary

The domain m.twinmate.co.kr is registered with an undisclosed registrar. It resolves to IP address twinmate.co.kr.. Email delivery is handled by Google Workspace. No valid SPF record was detected. DMARC protection is missing or unconfigured. Web traffic is secured with an SSL certificate issued by YR2.

Domain Overview: m.twinmate.co.kr

Domain Registration 🌐

Active N/A

Expires in N/A · DNSSEC: Unsigned

Email Security 🛡️

SPF: Missing DKIM: Not Detected DMARC: Missing

Google Workspace (6 MX)

SSL Certificate 🔒

Valid Chain 32 Days Left

Issuer: YR2 (3 SANs)

Server & Hosting 🖥️

N/A N/A

N/A

🌐 Domain & Registration Identity View Full Whois Details →

Domain	m.twinmate.co.kr
Website Title	N/A
Registered	N/A
Expires	N/A
Remaining Validity	N/A
Domain Age	N/A
Registrar	N/A
Domain Status	N/A i
DNSSEC Delegation	Unsigned · Zone not signed with DNSSEC keys i
Authoritative Nameservers	`twinmate.co.kr, ns1.cafe24.com, ns1.cafe24.co.kr, ns2.cafe24.com, ns2.cafe24.co.kr` i

🛡️ Email Security & Deliverability (SPF, DKIM, DMARC) View Complete Email Security Diagnostics →

Detected Email Provider	📬 Google Workspace
Primary Mail Server (MX)	`twinmate.co.kr (Priority: twinmate.co.kr.)` · 6 MX servers configured i
SPF Record (Sender Policy)	Missing i
DKIM Authentication	Not Detected · (No common third-party selector found; custom keys may be configured) i
DMARC Policy	Missing i
SMTP Port 25 Status	Failed · Inbound mail server handshake response

🖥️ Web Server, Hosting & Network View Full Server & Tech Details →

Web Server Software	N/A i
HTTP Status Code	N/A i
Server IP (IPv4)	twinmate.co.kr. View Geo Details →
IPv6 Address (AAAA)	`twinmate.co.kr.`
Reverse DNS (PTR)	`None Detected (No PTR Record)`
Server Location	📍 N/A
ASN Network & ISP	`N/A`
Hosting Provider	N/A i
Control Panel	Not Detected i
Technology Stack	No third-party framework or CMS fingerprints detected
HTTP Security Headers	None Detected (Missing HSTS / CSP) Audit Details →
DNSBL Blacklist Reputation	Not Checked

🔒 SSL/TLS Certificate Summary View Full SSL Certificate & Chain →

Primary Hostname (CN)	twinmate.co.kr · Multi-Domain SAN (Covers 3 hostnames)
SSL Issuer	YR2
SSL Valid Till	2026-10-31
Remaining Validity	32 Days
Chain Status	Valid Trusted Chain
Signature Algorithm	`RSA-SHA256`

Whois Ownership & Registration for m.twinmate.co.kr

📄 View Raw Registry Response ↓

Domain Information i

Domain Name

N/A

Registrar Information i

Name

N/A

Registrant Contact i

Contact information for this role is not provided or redacted.

Administrative Contact i

Contact information for this role is not provided or redacted.

Technical Contact i

Contact information for this role is not provided or redacted.

Nameservers i

📄 View Raw Registry Response RDAP (Hybrid)

query : m.twinmate.co.kr


# KOREAN(UTF8)

상기 호스트이름은 등록되어 있지 않습니다.
도메인(twinmate.co.kr)등록 여부를 확인하신 후, 네임서버 담당자에게 문의하십시오.



# ENGLISH

The requested Host was not found in the Registry or Registrar’s WHOIS Server.



- KISA/KRNIC WHOIS Service -

{
    "errorCode": 404,
    "status_code": 404,
    "title": "Object not found",
    "description": [
        "Domain is not registered in this RDAP registry."
    ],
    "raw_response": {
        "rdapConformance": [
            "rdap_level_0"
        ],
        "notices": [
            {
                "title": "KRNIC Domain Policy",
                "description": [
                    "Domain Name Management Rules by law"
                ],
                "links": [
                    {
                        "value": "https://krnic.kisa.or.kr/jsp/eng/policy/domainNewRules.jsp",
                        "rel": "terms-of-service",
                        "href": "https://krnic.kisa.or.kr/jsp/eng/policy/domainNewRules.jsp",
                        "type": "text/html"
                    }
                ]
            },
            {
                "title": "Status Codes",
                "description": [
                    "For more infomation on domain status codes, please visit https://icann.org/epp"
                ],
                "links": [
                    {
                        "value": "https://icann.org/epp",
                        "rel": "glossary",
                        "href": "https://icann.org/epp",
                        "type": "text/html"
                    }
                ]
            },
            {
                "title": "jCard deprecation",
                "description": [
                    "jCard has been deprecated"
                ]
            }
        ],
        "lang": "en",
        "errorCode": 404,
        "title": "Not Found",
        "description": [
            "No Data Found."
        ]
    }
}

DNS Records for m.twinmate.co.kr

NS Records i

Name	Data	Copy
m.twinmate.co.kr.	`twinmate.co.kr.`
twinmate.co.kr.	`ns1.cafe24.com.`
twinmate.co.kr.	`ns1.cafe24.co.kr.`
twinmate.co.kr.	`ns2.cafe24.com.`
twinmate.co.kr.	`ns2.cafe24.co.kr.`

A Records i

Name	Data	Copy
m.twinmate.co.kr.	`twinmate.co.kr.`
twinmate.co.kr.	`203.245.12.110`
twinmate.co.kr.	`203.245.12.126`
twinmate.co.kr.	`203.245.12.123`
twinmate.co.kr.	`183.111.139.233`

AAAA Records i

Name	Data	Copy
m.twinmate.co.kr.	`twinmate.co.kr.`

WWW Records (www.m.twinmate.co.kr) i

Type	Host	Value
CNAME	www.m.twinmate.co.kr.	`twinmate.co.kr.`
A	www.m.twinmate.co.kr.	`twinmate.co.kr.`
A	twinmate.co.kr.	`203.245.12.126`
A	twinmate.co.kr.	`203.245.12.110`
A	twinmate.co.kr.	`183.111.139.233`
A	twinmate.co.kr.	`203.245.12.123`

MX Records i

Priority	Mail Server Target	Copy
twinmate.co.kr.
5	`alt1.aspmx.l.google.com.`
10	`alt3.aspmx.l.google.com.`
5	`alt2.aspmx.l.google.com.`
10	`alt4.aspmx.l.google.com.`
1	`aspmx.l.google.com.`

TXT Records i

Name	Value	Copy
m.twinmate.co.kr.	`twinmate.co.kr.`
twinmate.co.kr.	`google-site-verification=1MXBS8wRbQsTuC6DjJkbrEcl6112nDwSuT8Wj3k10Ug`

Email Security (MX, SPF, DKIM, DMARC, SMTP) for m.twinmate.co.kr

Detected Email Provider

📬 Google Workspace

✓ Active MX Routing (6 Servers)

Mail Exchange (MX) Routing Records i

Priority	Mail Server Hostname	Copy
twinmate.co.kr.
1	`aspmx.l.google.com`
5	`alt1.aspmx.l.google.com`
5	`alt2.aspmx.l.google.com`
10	`alt3.aspmx.l.google.com`
10	`alt4.aspmx.l.google.com`

SPF Record Validation i

No SPF record found to validate.

Common DKIM Selectors i

No common third-party DKIM selectors found. Custom selectors may be configured.

🔍 Query Custom DKIM Selector

Live DNS Lookup

Using a custom or date-based selector (e.g. crm, newsletter, 2024)? Query its public key live on m.twinmate.co.kr:

DMARC Policy Validation i

No DMARC record found to validate.

Validation Summary

DMARC Record Published

Fail No DMARC record was found.

Optimization Suggestions

A DMARC record is essential for email security. It tells receiving servers what to do with emails that fail SPF and DKIM checks, protecting your domain from spoofing.

SMTP Connectivity Test (Port 25)

Mail Server	Status	Latency	Banner / Handshake Response
twinmate.co.kr	Failed	3028ms	`Connection failed (110: Connection timed out). Port 25 may be blocked.`

SSL/TLS Certificate Details for m.twinmate.co.kr

Issuer: YR2
Expires In: 32 Days
Chain Status: Valid Chain

🔒 SSL / TLS Protocol Support

Excellent

TLS protocol versions

TLS 1.3	Enabled
TLS 1.2	Enabled
TLS 1.1 (deprecated)	Disabled
TLS 1.0 (deprecated)	Disabled

SSL protocol versions

SSLv3 (deprecated)	Disabled
SSLv2 (deprecated)	Disabled

Main Leaf Certificate

Common Name: twinmate.co.kr
SANs: DNS:m.twinmate.co.kr, DNS:twinmate.co.kr, DNS:www.twinmate.co.kr
Organization: N/A
Validity: Aug 02, 2026 to Oct 31, 2026
Algorithm: RSA-SHA256

↓ Intermediate CA Certificate ↓

Common Name: YR2
Organization: Let's Encrypt
Valid Till: Sep 03, 2028
Issuer: Root YR

↓ Intermediate CA Certificate ↓

Common Name: Root YR
Organization: ISRG
Valid Till: Sep 03, 2032
Issuer: ISRG Root X1

Website & Server Intelligence for m.twinmate.co.kr

Website Identity

Title	N/A
Meta Description	N/A

Hosting & Server Network

IP Address	twinmate.co.kr.
HTTP Status	N/A i
Hosting Provider	N/A i
Web Server	N/A i
Control Panel	Not Detected i

Technology Profile

No specific third-party frameworks or CMS fingerprints detected.

HTTP Security Headers

Could not fetch HTTP headers.

Understanding Diagnostic Terms for m.twinmate.co.kr

Domain Status (EPP)

EPP status codes (e.g., clientTransferProhibited, active) indicating if a domain is locked against unauthorized transfer, pending renewal, or active.

Registrar Information

The authorized or accredited organization managing the domain reservation and authoritative registry delegation.

Nameservers (NS)

Authoritative servers that translate domain names into IP addresses and direct web visitors and mail traffic globally.

A & AAAA Records

Primary address records mapping your domain name directly to standard IPv4 (e.g., 192.0.2.1) and newer IPv6 server network addresses.

MX (Mail Exchange)

Priority-ranked records pointing inbound emails to designated mail server hosts (e.g., Google Workspace, Microsoft 365, Zoho).

SPF & DMARC Security

Email authentication standards that verify authorized sender IPs (SPF) and instruct receiving servers how to enforce security policies (DMARC).

DKIM Signatures

Cryptographic public key in DNS used by receiving mail servers to verify digital signatures on your emails, ensuring messages were not tampered with.

SSL Certificate & Chain

Establishes encrypted HTTPS connections and authenticates domain ownership via an intermediate certificate authority chain.

Hosting Provider & ASN

The physical server infrastructure where website files reside and the autonomous system network (ASN) routing global traffic.

Reverse DNS (PTR)

Pointer (PTR) records that map a server's IP address back to its canonical hostname, verifying server identity and preventing email spam rejection.

HTTP Security Headers

Directives like HSTS, CSP, and X-Frame-Options instructed by the server to protect browser visitors against XSS, clickjacking, and packet sniffing.

⚠️ Report Limitations & Data Sources

Data Currency: This report uses cached registry and DNS data (freshened within 4 hours) for high-speed resolution. Click "🔄 Refresh Live" to query directly against authoritative registries.
DNS Resolution & Propagation: Records are queried via Google Public DNS-over-HTTPS. Global DNS propagation may take up to 24–48 hours across different regional ISP resolvers during recent DNS record changes.
Completeness & Scope: This diagnostic tool analyzes standard authoritative records (A, AAAA, MX, NS, TXT, CNAME, SOA). It does not perform invasive brute-force subdomain scans or unauthenticated DNS zone transfers.
Email Deliverability & Reputation: The security analysis (SPF, DKIM, DMARC, and Port 25 SMTP handshake) reflects public DNS policies and inbound connection states. Recipient spam filters evaluate internal headers that cannot be checked from outside.
Reverse Proxies & CDNs: If a website is behind Cloudflare, Fastly, or another CDN/reverse proxy, the detected IP, web server software, and SSL edge certificate reflect the proxy tier.

Domain Overview: m.twinmate.co.kr

🌐 Domain & Registration Identity View Full Whois Details →

🛡️ Email Security & Deliverability (SPF, DKIM, DMARC) View Complete Email Security Diagnostics →

🖥️ Web Server, Hosting & Network View Full Server & Tech Details →

🔒 SSL/TLS Certificate Summary View Full SSL Certificate & Chain →

Whois Ownership & Registration for m.twinmate.co.kr

Domain Information i

Registrar Information i

Registrant Contact i

Administrative Contact i

Technical Contact i

Nameservers i

DNS Records for m.twinmate.co.kr

NS Records i

A Records i

AAAA Records i

WWW Records (www.m.twinmate.co.kr) i

MX Records i

TXT Records i

Email Security (MX, SPF, DKIM, DMARC, SMTP) for m.twinmate.co.kr

Mail Exchange (MX) Routing Records i

SPF Record Validation i

Common DKIM Selectors i

🔍 Query Custom DKIM Selector

DMARC Policy Validation i

Validation Summary

Optimization Suggestions

SMTP Connectivity Test (Port 25)

SSL/TLS Certificate Details for m.twinmate.co.kr

🔒 SSL / TLS Protocol Support

TLS protocol versions

SSL protocol versions

Main Leaf Certificate

Website & Server Intelligence for m.twinmate.co.kr

Website Identity

Hosting & Server Network

Technology Profile

HTTP Security Headers

IP Details & Geolocation

Understanding Diagnostic Terms for m.twinmate.co.kr

Domain Status (EPP)

Registrar Information

Nameservers (NS)

A & AAAA Records

MX (Mail Exchange)

SPF & DMARC Security

DKIM Signatures

SSL Certificate & Chain

Hosting Provider & ASN

Reverse DNS (PTR)

HTTP Security Headers

⚠️ Report Limitations & Data Sources