rsgd.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 25 June 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.tutanota.de. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.tutanota.de | 185.205.69.211 185.205.69.213 185.205.69.214 |
mail.w11.tutanota.de mail.w13.tutanota.de mail.w14.tutanota.de |
AS210909 Tutao GmbH AS210909 Tutao GmbH AS210909 Tutao GmbH |
| TXT Record |
|---|
| t-verify=b2244cbf6f8734b802855753849a206d |
| v=spf1 include:spf.tutanota.de -all |
| Policy | Record (rsgd.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.tutanota.de -all |
| Policy | Record (_dmarc.rsgd.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; adkim=s |
| Check | Result |
|---|---|
| Status | 🔒 Enforce |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | enforce |
| Policy ID | 20190723 |
| max_age | 86400s |
| Policy MX | mail.tutanota.de |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves rsgd.dk: no address www.rsgd.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.tutanota.de | RSA · ~2048 bit |
| s2 | s2.domainkey.tutanota.de | 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.mail.tutanota.de | DANE-EE · Full cert · SHA-256 | D141F8F3A4AAC2E4D2677AAFCC723D8E… |
| SMTP _25._tcp.mail.tutanota.de | DANE-EE · SPKI · SHA-256 | 5AE0D6DC8A713441003F578C5A1D4D70… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026100200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2025-06-25 |
| Expires | 2027-06-24 (241d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 15:34:47 | 766ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-09 09:59:10 | 1088ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-03 05:59:16 shown | 1192ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-27 10:32:06 | 1015ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-03 01:16:38 | 866ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-25 01:17:41 | 807ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-23 02:22:38 | 1178ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 14:03:03 | 2184ms | 3 NS 0 A 1 MX | 🔒 Secure |