degroot.dk
📜 Historical scan 2026-08-20 23:18:21  ·  ← Latest scan
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers4 records   79ms
🌍 A Records1 records   92ms
📧 MX Records2 records   8071ms
PriorityTTLMail ServerIP addressesPTRASN
10 3592s mx01.mail.icloud.com 17.42.251.62
17.42.251.62
17.42.251.62
17.56.9.31
17.56.9.31
17.57.152.5
17.57.152.5
17.57.152.5
17.57.152.5
17.57.154.33
17.57.154.33
17.57.155.25
17.57.155.25
17.57.156.30
17.57.156.30
mx01.mail.icloud.com
mx02.mail.icloud.com
mx3.mail.icloud.com
mx02.mail.icloud.com
mx01.mail.icloud.com
ic4-privaterelay.appleid.com
smtp1.ic4-privaterelay.appleid.com
mx02.mail.icloud.com
mx01.mail.icloud.com
mx01.mail.icloud.com
mx02.mail.icloud.com
mx02.mail.icloud.com
mx01.mail.icloud.com
mx01.mail.icloud.com
mx02.mail.icloud.com
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
10 3592s mx02.mail.icloud.com 17.42.251.62
17.42.251.62
17.42.251.62
17.56.9.31
17.56.9.31
17.57.152.5
17.57.152.5
17.57.152.5
17.57.152.5
17.57.154.33
17.57.154.33
17.57.155.25
17.57.155.25
17.57.156.30
17.57.156.30
mx3.mail.icloud.com
mx02.mail.icloud.com
mx01.mail.icloud.com
mx02.mail.icloud.com
mx01.mail.icloud.com
mx01.mail.icloud.com
mx02.mail.icloud.com
smtp1.ic4-privaterelay.appleid.com
ic4-privaterelay.appleid.com
mx01.mail.icloud.com
mx02.mail.icloud.com
mx02.mail.icloud.com
mx01.mail.icloud.com
mx01.mail.icloud.com
mx02.mail.icloud.com
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
AS714 Apple Inc.
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscover93.191.156.213
🔶 Autoconfig93.191.156.213
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
🔌 SRV Records1 records   172ms
ServicePriorityWeightPortTarget
_autodiscover._tcp 10 10 443 maildiscover.simply.com
📝 TXT Records2 records   16468ms
TXT Record
apple-domain=6dMbo1otefrzsS8w
v=spf1 redirect=icloud.com
✉️ SPF
PolicyRecord (degroot.dk)
no all — incomplete SPF v=spf1 redirect=icloud.com
📨 DMARC
PolicyRecord (_dmarc.degroot.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 / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC8101ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated
🏷️ SOA8080ms
FieldValue
Serial2021112707
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
79ms
A
92ms
MX
8071ms
AAAA
8083ms
TXT
16468ms
CAA
8082ms
HTTPS
8082ms
TLSA
76ms
SOA
8080ms
MTA-STS
93ms
DNSSEC
8101ms
SRV
172ms
Total
33639ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-27 10:29:36 791ms 4 NS 1 A 2 MX 🔒 Secure View
2026-08-26 12:36:21 854ms 4 NS 1 A 2 MX 🔒 Secure View
2026-08-26 03:28:39 726ms 4 NS 1 A 2 MX 🔒 Secure View
2026-08-20 23:18:21 33639ms 4 NS 1 A 2 MX 🔒 Secure View
2026-06-22 05:05:56 720ms 4 NS 1 A 2 MX 🔒 Secure View
2026-06-17 01:42:19 3009ms 4 NS 1 A 2 MX 🔒 Secure View
2026-06-17 01:30:50 839ms 4 NS 1 A 2 MX 🔒 Secure View
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