mailcore.dk is a .dk domain served by 3 nameservers (helium.ns.hetzner.de, hydrogen.ns.hetzner.com, oxygen.ns.hetzner.com). It was registered on 16 June 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 78.31.252.23 is hosted by EWII Bredbaand A/S (AS204151) in Denmark. Mail is handled by smtp.mailpro.dk. The zone is of unknown DNSSEC status, 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 |
|---|---|---|---|---|---|---|---|
| 78.31.252.23 | 300s | smtp.mailpro.dk | AS204151 | EWII Bredbaand A/S | 78.31.252.0/22 | 🇩🇰 Denmark | Ans |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | smtp.mailpro.dk | 78.31.252.23 | smtp.mailpro.dk | AS204151 EWII Bredbaand A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | smtp.mailpro.dk.mailcore.dk → 78.31.252.23 |
| 🔶 Autoconfig | smtp.mailpro.dk.mailcore.dk → 78.31.252.23 |
| TXT Record |
|---|
| v=spf1 a mx ip4:78.31.252.23 -all |
| Policy | Record (mailcore.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx ip4:78.31.252.23 -all |
| Policy | Record (_dmarc.mailcore.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:postmaster@mailpro.dk |
| www | 78.31.252.23 (AS204151) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | ❓ Unknown |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'mailcore.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2026070603 |
| Primary NS (MNAME) | hydrogen.ns.hetzner.com |
| Responsible (RNAME) | dns@hetzner.com |
| Refresh | 86400s |
| Retry | 10800s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2025-06-16 |
| Expires | 2029-06-15 (971d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 13:37:22 | 1677ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-27 12:31:13 | 811ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-29 00:22:41 | 5323ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 11:22:27 | 729ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-09 02:08:52 shown | 1324ms | 3 NS 1 A 1 MX | ❓ Unknown |
| 2026-07-02 12:55:52 | 2602ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 08:59:49 | 799ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 01:05:33 | 957ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 17:05:29 | 3876ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 16:06:29 | 1166ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 18:19:26 | 1065ms | 3 NS 1 A 1 MX | 🔓 Insecure |