nkdk.dk
Last scanned: 2026-08-25 19:02:14  ·  851ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers3 records   55ms
NameserverIP addressesPTRASN / ISP
ns1.simply.com 2a02:2339:1:15c::4562:4562
91.197.248.78		 ns1.simply.com
ns1.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns2.simply.com 185.25.141.15
2a02:2339:4006:101::4562:4562		 ns2.simply.com
ns2.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S
ns3.simply.com 91.197.248.79 ns3.simply.com AS48854 team.blue Denmark A/S
🌍 A Records
🌍
No A records found
📧 MX Records1 records   41ms
PriorityTTLMail ServerIP addressesPTRASN
10 60s mail.tutanota.de 185.205.69.211
185.205.69.213
185.205.69.214		 mail.w11.tutanota.de
mail.w13.tutanota.de
mail.w14.tutanota.de		 AS210909 Tutao GmbH
AS210909 Tutao GmbH
AS210909 Tutao GmbH
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records2 records   182ms
TXT Record
t-verify=c01983d8e7393d9b57d6aaed906d1301
v=spf1 include:spf.tutanota.de -all
✉️ SPF
PolicyRecord (nkdk.dk)
-all (hard fail) v=spf1 include:spf.tutanota.de -all
📨 DMARC
PolicyRecord (_dmarc.nkdk.dk)
p=quarantine v=DMARC1; p=quarantine; rua=mailto:dtk@nkdk.dk; ruf=mailto:dtk@nkdk.dk; fo=1;
📬 MTA-STS337ms
CheckResult
Status🔒 Enforce
TXT record (_mta-sts)✓ Found
HTTPS policy✓ Valid
Modeenforce
Policy ID20190723
max_age86400s
Policy MXmail.tutanota.de
📈 TLSRPT
✗ No TLSRPT record — no SMTP TLS failure reporting
📜 CAA Records
✗ No CAA records — any CA may issue certificates
🔏 ACME Challenge
TypeNameValue
TXT _acme-challenge.nkdk.dk _Mte16_xkUSGBDcQUIf_Jk1tE7vSI99NEg-UI8Vb4NI
TXT _acme-challenge.nkdk.dk ayi0e9Lho2BzCCgD4yj3tU-QHMaerC50p9cmZAdOwW4
TXT _acme-challenge.nkdk.dk gakp13AYtutWui1m4PyeJe0QO4TPrpFsi9NW9mJv_sc
🔗 TLSA / DANE1 records   119ms
Service / OwnerTypeCert association
SMTP _25._tcp.mail.tutanota.de DANE-EE · Full cert · SHA-256 D141F8F3A4AAC2E4D2677AAFCC723D8E…
🔐 DNSSEC138ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsresolution failed: ncache nxrrset
🏷️ SOA0ms
FieldValue
Serial2026081700
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
55ms
A
37ms
MX
41ms
AAAA
39ms
TXT
182ms
CAA
34ms
HTTPS
33ms
TLSA
119ms
SOA
0ms
MTA-STS
337ms
DNSSEC
138ms
SRV
87ms
Total
851ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-25 19:02:14 851ms 3 NS 0 A 1 MX 🔒 Secure View
2026-08-17 09:55:47 8737ms 3 NS 0 A 1 MX 🔒 Secure View
2026-06-26 11:25:39 825ms 3 NS 0 A 1 MX 🔒 Secure View
2026-06-19 12:57:29 1155ms 3 NS 0 A 1 MX 🔒 Secure View
2026-06-18 06:42:55 942ms 3 NS 0 A 1 MX 🔒 Secure View
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