postbag.dk

📜 Historical scan 2026-08-23 04:30:50 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

postbag.dk is a .dk domain served by 2 nameservers (dane.ns.cloudflare.com, iris.ns.cloudflare.com). It was registered on 17 March 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.improvmx.com, mx2.improvmx.com. The zone is not DNSSEC-signed, has no 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.

🖥️ Nameservers#

2 records 202ms

Nameserver	IP addresses	PTR	ASN / ISP
dane.ns.cloudflare.com	108.162.193.97 172.64.33.97 173.245.59.97 2606:4700:58::adf5:3b61 2803:f800:50::6ca2:c161 2a06:98c1:50::ac40:2161	dane.ns.cloudflare.com dane.ns.cloudflare.com dane.ns.cloudflare.com dane.ns.cloudflare.com dane.ns.cloudflare.com dane.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
iris.ns.cloudflare.com	108.162.192.118 172.64.32.118 173.245.58.118 2606:4700:50::adf5:3a76 2803:f800:50::6ca2:c076 2a06:98c1:50::ac40:2076	iris.ns.cloudflare.com iris.ns.cloudflare.com iris.ns.cloudflare.com iris.ns.cloudflare.com iris.ns.cloudflare.com iris.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

🌍

No A records found

📧 MX Records#

2 records 189ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx1.improvmx.com	13.37.195.136 15.236.236.160 2a05:d012:412:e201:88aa:e7b9:7a43:12d7 2a05:d012:412:e202:f36:2c1f:1a49:d38a 2a05:d012:412:e203:373a:f51a:4a85:1d25 35.181.18.45	ec2-13-37-195-136.eu-west-3.compute.amazonaws.com ec2-15-236-236-160.eu-west-3.compute.amazonaws.com — — — ec2-35-181-18-45.eu-west-3.compute.amazonaws.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
20	300s	mx2.improvmx.com	13.36.107.63 13.36.222.39 15.236.61.92 2a05:d012:412:e201:1f6e:f6e4:8fd7:4678 2a05:d012:412:e202:e81e:cc44:3b53:8a3d 2a05:d012:412:e203:7e33:3d9c:28d7:ee20	ec2-13-36-107-63.eu-west-3.compute.amazonaws.com ec2-13-36-222-39.eu-west-3.compute.amazonaws.com ec2-15-236-61-92.eu-west-3.compute.amazonaws.com — — —	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 845ms

TXT Record
v=spf1 include:improvmx.com ~all

✉️ SPF#

Policy	Record (postbag.dk)
~all (soft fail)	v=spf1 include:improvmx.com ~all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-12 18:12:15

www	NXDOMAIN
www vs bare domain	Neither resolves postbag.dk: no address www.postbag.dk: no address
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 8/10 · policy: ~all

warn 8 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

450ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

0ms

Field	Value
Serial	2412927450
Primary NS (MNAME)	dane.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-05 19:29:24

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-03-17
Expires	2030-03-31 (1255d)

📋 WHOIS#

⏱️ Lookup Timing#

202ms

276ms

189ms

AAAA

179ms

TXT

845ms

CAA

170ms

HTTPS

304ms

TLSA

310ms

SOA

0ms

MTA-STS

350ms

DNSSEC

450ms

SRV

367ms

Total

11247ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 18:12:15	1610ms	2 NS 0 A 3 MX	🔓 Insecure
2026-10-09 11:37:12	995ms	2 NS 0 A 3 MX	🔓 Insecure
2026-10-06 02:38:14	1004ms	2 NS 0 A 3 MX	🔓 Insecure
2026-10-01 02:00:56	943ms	2 NS 0 A 2 MX	🔓 Insecure
2026-09-30 01:17:14	595ms	2 NS 0 A 2 MX	🔓 Insecure
2026-09-19 21:38:41	749ms	2 NS 0 A 2 MX	🔓 Insecure
2026-09-04 09:56:04	1189ms	2 NS 0 A 2 MX	🔓 Insecure
2026-08-26 20:20:28	640ms	2 NS 0 A 2 MX	🔓 Insecure
2026-08-23 04:30:50 shown	11247ms	2 NS 0 A 2 MX	🔓 Insecure
2026-08-22 04:25:52	1742ms	2 NS 0 A 2 MX	🔓 Insecure
2026-08-15 09:09:24	1500ms	2 NS 0 A 2 MX	🔓 Insecure
2026-07-06 21:14:40	2008ms	2 NS 0 A 2 MX	🔓 Insecure
2026-06-26 10:24:16	817ms	2 NS 0 A 2 MX	🔓 Insecure
2026-06-24 08:57:05	1191ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 15:22:41	2686ms	2 NS 0 A 2 MX	🔓 Insecure
2026-06-18 00:26:29	4740ms	2 NS 0 A 2 MX	🔓 Insecure