sendmail.dk is a .dk domain served by 2 nameservers (ns1.dns-sec.dk, ns2.dns-sec.dk). It was registered on 28 November 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.dns-sec.dk | 92.241.203.106 | ns1.dns-sec.dk | AS3342 Cibicom A/S |
| ns2.dns-sec.dk | 92.241.203.107 | ns2.dns-sec.dk | AS3342 Cibicom A/S |
| TXT Record |
|---|
| v=spf1 include:_spf.resennet.dk -all |
| Policy | Record (sendmail.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.resennet.dk -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves sendmail.dk: no address www.sendmail.dk: no address |
| Wildcard | No |
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2024070804 |
| Primary NS (MNAME) | ns1.dns-sec.dk |
| Responsible (RNAME) | admin@dns-sec.dk |
| Refresh | 900s |
| Retry | 1200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Domeneshop AS |
| Registered | 2002-11-28 |
| Expires | 2026-12-31 (74d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 04:38:46 shown | 344ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-09-27 21:22:08 | 818ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-08-27 23:19:42 | 2510ms | 2 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-18 07:37:34 | 2350ms | 2 NS 0 A 0 MX | 🔓 Insecure |