smtprelay.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 19 June 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.5.39.153 is hosted by Bo data ApS (AS49974) in Denmark. Mail is handled by ispconfig.eero.dk. 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 |
|---|---|---|---|---|---|---|---|
| 213.5.39.153 | 3600s | ispconfig.eero.dk | AS49974 | Bo data ApS | 213.5.32.0/21 | 🇩🇰 Denmark | Vildbjerg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | ispconfig.eero.dk | 213.5.39.153 | ispconfig.eero.dk | AS49974 Bo data ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 213.5.39.153 |
| 🔶 Autoconfig | 213.5.39.153 |
| TXT Record |
|---|
| v=spf1 a mx -all |
| Policy | Record (smtprelay.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx -all |
| Policy | Record (_dmarc.smtprelay.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 213.5.39.153 (AS49974) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 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 | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026032402 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-06-19 |
| Expires | 2027-06-30 (256d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 16:21:00 | 624ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 16:06:50 | 594ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 07:24:47 | 965ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 03:14:15 | 784ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-21 20:06:35 shown | 4843ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-26 02:42:15 | 4655ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 17:53:00 | 582ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 16:16:27 | 2710ms | 2 NS 1 A 1 MX | 🔒 Secure |