mailrelay.dk

📜 Historical scan 2026-09-24 21:41:49  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

mailrelay.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 9 March 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.186.56.17 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by mailrelay.dk. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   34ms
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#

1 records   42ms
IPTTLPTRASNISP / OrgCIDRCountryCity
5.186.56.17 43200s 5.186.56.17.static.fibianet.dk AS44869 FIBIA P/S 5.186.0.0/16 🇩🇰 Denmark Rønde

📧 MX Records#

1 records   34ms
PriorityTTLMail ServerIP addressesPTRASN
10 86400s mailrelay.dk 5.186.56.17 5.186.56.17.static.fibianet.dk AS44869 FIBIA P/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover5.186.56.17
🔶 Autoconfig5.186.56.17

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records   156ms
TXT Record
as=1607364967
v=spf1 ip4:5.186.56.17/32 ?all

✉️ SPF#

PolicyRecord (mailrelay.dk)
?all (neutral) v=spf1 ip4:5.186.56.17/32 ?all

📨 DMARC#

PolicyRecord (_dmarc.mailrelay.dk)
p=none (monitor only) v=DMARC1; p=none; rua=mailto:dmarc.rua@mailrelay.dk; ruf=mailto:dmarc.ruf@mailrelay.dk

📬 MTA-STS#

97ms
CheckResult
Status⚠️ Invalid
TXT record (_mta-sts)✓ Found
HTTPS policy✗ Missing / invalid
Policy ID20250327T010101
Policy MX—

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 05:18:30
www5.186.56.17 (AS44869) (address records, no CNAME)
www vs bare domainSame network
mailrelay.dk: 5.186.56.17 (AS44869)
www.mailrelay.dk: 5.186.56.17 (AS44869)
WildcardYes: any name under the zone resolves
CDS / CDNSKEYNone 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: ?all

  • warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.mailrelay.dk 4sMPIw_GVjWZz-3aH1F-hCuk98CF_kDAiM7wczuDIzg

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

115ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2026092301
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s

📋 Registration#

WHOIS fetched 2026-10-04 04:23:03
FieldValue
RegistrarONE.COM A/S
Registered2015-03-09
Expires2030-03-31 (1254d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
34ms
A
42ms
MX
34ms
AAAA
45ms
TXT
156ms
CAA
38ms
HTTPS
37ms
TLSA
50ms
SOA
0ms
MTA-STS
97ms
DNSSEC
115ms
SRV
65ms
Total
573ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-04 03:39:34 439ms 2 NS 1 A 1 MX 🔒 Secure
2026-10-02 03:38:25 2946ms 2 NS 1 A 1 MX 🔒 Secure
2026-10-01 03:31:37 574ms 2 NS 1 A 1 MX 🔒 Secure
2026-09-28 05:55:30 493ms 2 NS 1 A 1 MX 🔒 Secure
2026-09-24 21:41:49 shown 573ms 2 NS 1 A 1 MX 🔒 Secure
2026-09-07 08:51:29 734ms 2 NS 1 A 1 MX 🔒 Secure
2026-08-27 08:08:44 777ms 2 NS 1 A 1 MX 🔒 Secure
2026-08-12 17:27:02 924ms 2 NS 1 A 1 MX 🔒 Secure
2026-08-02 19:10:49 16521ms 2 NS 1 A 1 MX 🔒 Secure
2026-07-03 08:25:25 871ms 2 NS 1 A 1 MX 🔒 Secure
2026-06-17 13:11:48 3718ms 2 NS 1 A 1 MX 🔒 Secure
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