cstp.dk
Last scanned: 2026-08-31 11:26:17  ·  750ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   44ms
NameserverIP addressesPTRASN / ISP
ns01.one.com 195.206.121.10
2001:67c:28cc::10		 ns01.one.com
ns01.one.com		 AS197495 One.com A/S
AS197495 One.com A/S
ns02.one.com 185.10.11.10
2001:67c:3c0::10		 ns02.one.com
ns02.one.com		 AS51468 One.com A/S
AS51468 One.com A/S
🌍 A Records
🌍
No A records found
📧 MX Records1 records   32ms
PriorityTTLMail ServerIP addressesPTRASN
1 43200s 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   161ms
TXT Record
t-verify=1a176b337f972bbb69280754f8f57c95
v=spf1 include:spf.tutanota.de -all
✉️ SPF
PolicyRecord (cstp.dk)
-all (hard fail) v=spf1 include:spf.tutanota.de -all
📨 DMARC
PolicyRecord (_dmarc.cstp.dk)
p=quarantine v=DMARC1; p=quarantine; adkim=s
📬 MTA-STS269ms
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
🔗 TLSA / DANE1 records   136ms
Service / OwnerTypeCert association
SMTP _25._tcp.mail.tutanota.de DANE-EE · Full cert · SHA-256 D141F8F3A4AAC2E4D2677AAFCC723D8E…
🔐 DNSSEC82ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsresolution failed: ncache nxrrset
🏷️ SOA0ms
FieldValue
Serial2026081201
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
44ms
A
39ms
MX
32ms
AAAA
31ms
TXT
161ms
CAA
40ms
HTTPS
46ms
TLSA
136ms
SOA
0ms
MTA-STS
269ms
DNSSEC
82ms
SRV
59ms
Total
750ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-31 11:26:17 750ms 2 NS 0 A 1 MX 🔒 Secure View
2026-08-25 02:38:32 2551ms 2 NS 0 A 1 MX 🔒 Secure View
2026-08-12 18:40:58 3087ms 2 NS 0 A 1 MX 🔒 Secure View
2026-07-19 00:47:46 862ms 2 NS 0 A 1 MX 🔒 Secure View
2026-07-13 14:06:48 994ms 2 NS 0 A 1 MX 🔒 Secure View
2026-06-22 05:44:43 799ms 2 NS 0 A 1 MX 🔒 Secure View
2026-06-16 23:06:01 707ms 2 NS 0 A 1 MX ⚠️ Bogus View
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