mail-online.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.144 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mail.mail-online.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 |
|---|---|---|---|---|---|---|---|
| 185.21.42.144 | — | mail.post-online.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.mail-online.dk | 185.21.42.141 | mail.mail-online.dk | AS48854 team.blue Denmark A/S |
| TXT Record |
|---|
| 8th48lus729j9i1dutpgsr24dv |
| google-site-verification=p2M-88qPcgBsMkqQZSAMeClSno6mnFD28jH2ZfL6tNw |
| v=spf1 ip4:185.21.42.141 ip4:185.21.42.133 ip4:168.245.101.128 ip4:168.245.98.120 include:send.heyloyalty.com -all |
| Policy | Record (mail-online.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:185.21.42.141 ip4:185.21.42.133 ip4:168.245.101.128 ip4:168.245.98.120 include:send.heyloyalty.com -all |
| Policy | Record (_dmarc.mail-online.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:mg05y8cd40@rua.powerdmarc.com; ruf=mailto:mg05y8cd40@ruf.powerdmarc.com; pct=100; fo=0:1:d:s; |
| www | 185.21.41.11 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| BIMI | v=BIMI1;l=https://app.powerbimi.com/3315/9c78dcad-ff50-4491-a5bf-4c5f38b1f0ea.svg; |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u14942987.wl238.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u14942987.wl238.sendgrid.net | 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: 1/10 · 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 | 2026011901 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 10:30:32 | 430ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 23:29:25 | 516ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 07:27:07 | 618ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-18 11:37:55 | 703ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-14 17:15:47 | 784ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-13 07:38:40 | 712ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-12 05:34:44 | 873ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 04:17:10 shown | 2442ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 04:07:04 | 912ms | 2 NS 1 A 1 MX | 🔒 Secure |