mailtools.dk is a .dk domain served by 4 nameservers (arthur.cutisan.dk, bes.cutisan.dk, merlin.cutisan.dk and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by thoth.cutisan.net, merlin.cutisan.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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 86400s | thoth.cutisan.net | 2001:470:28:404:0:6:0:2 90.185.206.63 |
thoth.cutisan.net thoth.cutisan.net |
AS6939 Hurricane Electric LLC AS203953 Hiper A/S |
| 20 | 86400s | merlin.cutisan.dk | 2001:470:28:2f7:0:1:0:1 80.198.171.101 |
merlin.cutisan.dk merlin.cutisan.dk |
AS6939 Hurricane Electric LLC AS3292 TDC Holding A/S |
| TXT Record |
|---|
| v=spf1 include:_spf.myemail.dk -all |
| Policy | Record (mailtools.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.myemail.dk -all |
| Policy | Record (_dmarc.mailtools.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; pct=100; fo=1; ri=86400; rua=mailto:postmaster@mailtools.dk; ruf=mailto:postmaster@mailtools.dk |
| www CNAME | arthur.cutisan.dk (all on cutisan.dk) |
| www vs bare domain | Only www resolves (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 10 iterations · 16-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | 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: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.merlin.cutisan.dk | DANE-TA · SPKI · SHA-256 | B3FB5D00E994CDDF2CC9A4EEA9F806BC… |
| SMTP _25._tcp.merlin.cutisan.dk | DANE-TA · SPKI · SHA-512 | 8B0A0CBBE72552E12AB3C82CF13F4793… |
| SMTP _25._tcp.merlin.cutisan.dk | DANE-TA · SPKI · SHA-512 | 115F68647DC892788AD8BE021FDEA758… |
| SMTP _25._tcp.merlin.cutisan.dk | DANE-TA · SPKI · SHA-256 | 6EBCEFB4210B088654A38B03FEA3D7D1… |
| SMTP _25._tcp.thoth.cutisan.net | DANE-TA · SPKI · SHA-256 | 2E8307068B6DB620E4A39D068B5DEE5D… |
| SMTP _25._tcp.thoth.cutisan.net | DANE-TA · SPKI · SHA-256 | 9D637B3D27A9E570D07607B9CCADB80A… |
| SMTP _25._tcp.thoth.cutisan.net | DANE-TA · SPKI · SHA-512 | A90D0606D641B94AFF27371F57E0BE27… |
| SMTP _25._tcp.thoth.cutisan.net | DANE-TA · SPKI · SHA-512 | B71DB2EF3A7AEC54F4651711B72821EC… |
| Check | Result |
|---|---|
| Validation Status | ❓ Unknown |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | broken trust chain resolving 'mailtools.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2023033973 |
| Primary NS (MNAME) | thoth.cutisan.net |
| Responsible (RNAME) | postmaster@cutisan.dk |
| Refresh | 21600s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 09:51:25 shown | 1064ms | 4 NS 0 A 2 MX | ❓ Unknown |
| 2026-10-15 06:40:09 | 4237ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-13 04:19:39 | 1080ms | 4 NS 0 A 2 MX | ❓ Unknown |
| 2026-10-12 02:52:29 | 3014ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-11 01:53:09 | 3406ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-09 22:43:12 | 1157ms | 4 NS 0 A 2 MX | ❓ Unknown |
| 2026-10-08 21:28:58 | 2453ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-07 21:26:13 | 3975ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-06 21:22:13 | 780ms | 4 NS 0 A 2 MX | ❓ Unknown |
| 2026-10-05 20:36:58 | 2749ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-04 20:26:12 | 3275ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-10-02 20:20:15 | 1208ms | 4 NS 0 A 2 MX | ❓ Unknown |
| 2026-10-01 20:19:35 | 2405ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-30 20:15:36 | 3725ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-29 20:02:18 | 2806ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-28 19:51:12 | 2704ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-27 19:46:56 | 2280ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-26 19:42:13 | 2389ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-25 19:32:18 | 3517ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-24 19:22:08 | 2564ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-23 18:07:52 | 4022ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-22 07:28:53 | 6164ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-15 06:54:34 | 5684ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-08 04:34:13 | 4787ms | 4 NS 0 A 0 MX | ⚠️ Bogus |
| 2026-09-04 00:01:08 | 2273ms | 4 NS 0 A 0 MX | ⚠️ Bogus |