21k.dk
Last scanned: 2026-06-26 13:01:40  ·  1218ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   194ms
🌍 A Records1 records   201ms
📧 MX Records1 records   217ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mx.simply.com 94.231.106.20 mx.simply.com AS48854 team.blue Denmark A/S
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscover93.191.156.90
🔶 Autoconfigmaildiscover.simply.com → 94.231.108.222
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
🔌 SRV Records1 records   335ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 maildiscover.simply.com
📝 TXT Records1 records   327ms
TXT Record
v=spf1 include:spf.simply.com -all
✉️ SPF
PolicyRecord (21k.dk)
-all (hard fail) v=spf1 include:spf.simply.com -all
📨 DMARC
PolicyRecord (_dmarc.21k.dk)
p=reject v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com;
📬 MTA-STS
✗ No MTA-STS policy — SMTP TLS not enforced
📈 TLSRPT
✗ No TLSRPT record — no SMTP TLS failure reporting
📜 CAA Records
✗ No CAA records — any CA may issue certificates
🔗 TLSA / DANE2 records   97ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 A9D603AF4D7ED6B9246B4B68500CD6F2…
🔐 DNSSEC461ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA210ms
FieldValue
Serial2025042300
Primary NS (MNAME)ns1.simply.com
Responsible (RNAME)hostmaster@simply.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
194ms
A
201ms
MX
217ms
AAAA
234ms
TXT
327ms
CAA
190ms
HTTPS
214ms
TLSA
97ms
SOA
210ms
MTA-STS
250ms
DNSSEC
461ms
SRV
335ms
Total
1218ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-26 13:01:40 1218ms 3 NS 1 A 1 MX 🔒 Secure View
2026-06-19 13:12:31 2637ms 3 NS 1 A 1 MX 🔒 Secure View
2026-06-16 13:29:05 7636ms 3 NS 1 A 1 MX 🔒 Secure View
2026-06-16 13:12:54 718ms 3 NS 1 A 1 MX 🔒 Secure View
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