mailuser.dk is a .dk domain served by 5 nameservers (ns1pri.webhosting.dk, ns2.mywebtonet.com, ns2.webhosting.dk and 2 more). It was registered on 21 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 157.250.160.38 is hosted by Cibicom A/S (AS3342) in Denmark. Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 157.250.160.38 | 600s | webhotel18.webhosting.dk | AS3342 | Cibicom A/S | 157.250.160.0/20 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | autodiscover.10mand.dk |
| TXT Record |
|---|
| v=spf1 mx a:mail.10mand.dk ip4:193.88.64.50 include:_spf.centerasecurity.dk include:spf.webhosting.dk -all |
| Policy | Record (mailuser.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a:mail.10mand.dk ip4:193.88.64.50 include:_spf.centerasecurity.dk include:spf.webhosting.dk -all |
| Policy | Record (_dmarc.mailuser.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:63359fbf@in.mailhardener.com,postmaster@mailuser.dk; ruf=mailto:63359fbf@in.mailhardener.com,postmaster@mailuser.dk; adkim=r; aspf=s; pct=100; rf=afrf; ri=84600 |
| Check | Result |
|---|---|
| Status | ⚠️ Invalid |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✗ Missing / invalid |
| Policy ID | 20240719T09 |
| Policy MX | — |
| www | 157.250.160.38 (AS3342) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| HTTPS _443._tcp.mailuser.dk | DANE-EE · SPKI · SHA-256 | 9F19D48303D2702786B0EF26C7AE562C… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 3409041425 |
| Primary NS (MNAME) | ns1pri.webhosting.dk |
| Responsible (RNAME) | hostmaster@webhosting.dk |
| Refresh | 21600s |
| Retry | 3600s |
| Expire | 14515200s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | WEBHOSTING A/S |
| Registered | 2017-02-21 |
| Expires | 2027-02-28 (130d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 12:30:52 | 936ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-06 10:40:23 | 2796ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-30 09:50:53 shown | 750ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-02 04:25:23 | 2759ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-24 17:30:40 | 2787ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-09 20:17:07 | 9497ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-09 18:26:24 | 1820ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-04 12:54:26 | 6704ms | 5 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 10:08:52 | 949ms | 5 NS 1 A 3 MX | ⚠️ Bogus |
| 2026-06-17 22:45:02 | 1511ms | 5 NS 1 A 3 MX | 🔒 Secure |