mailcow.dk DNS records

🖥️ Nameservers2 records 86ms

Nameserver	IP addresses	PTR	ASN / ISP
alexandra.ns.cloudflare.com	108.162.194.30 162.159.38.30 172.64.34.30 2606:4700:50::a29f:261e 2803:f800:50::6ca2:c21e 2a06:98c1:50::ac40:221e	alexandra.ns.cloudflare.com alexandra.ns.cloudflare.com alexandra.ns.cloudflare.com alexandra.ns.cloudflare.com alexandra.ns.cloudflare.com alexandra.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
elias.ns.cloudflare.com	108.162.195.29 162.159.44.29 172.64.35.29 2606:4700:58::a29f:2c1d 2803:f800:50::6ca2:c31d 2a06:98c1:50::ac40:231d	elias.ns.cloudflare.com elias.ns.cloudflare.com elias.ns.cloudflare.com elias.ns.cloudflare.com elias.ns.cloudflare.com elias.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 Records1 records 84ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	mx.mailcow.cloud	86.52.113.234	86-52-113-234.norlyscustomer.net	AS39642 Sinal A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	mx.mailcow.cloud → 86.52.113.234
🔶 Autoconfig	mx.mailcow.cloud → 86.52.113.234

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 225ms

Service	Priority	Weight	Port	Target
_imap._tcp	0	1	143	mx.mailcow.cloud
_imaps._tcp	0	1	993	mx.mailcow.cloud

📝 TXT Records1 records 455ms

TXT Record
v=spf1 mx a -all

✉️ SPF

Policy	Record (mailcow.dk)
-all (hard fail)	v=spf1 mx a -all

📨 DMARC

Policy	Record (_dmarc.mailcow.dk)
p=reject	v=DMARC1; p=reject;

📬 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.mailcow.dk	JifAjwXOYlZqLpV5-8WbqGONcscTHDvvGhCvt8AJw_s
TXT	_acme-challenge.mailcow.dk	SZ0vmQbsIP0mgWsc2-pQwd-hbaLLxFwnZuxKJLqHlGM

🔗 TLSA / DANE

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

🔐 DNSSEC249ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA0ms

Field	Value
Serial	2413403413
Primary NS (MNAME)	alexandra.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

86ms

A

112ms

MX

84ms

AAAA

91ms

TXT

455ms

CAA

80ms

HTTPS

106ms

TLSA

440ms

SOA

0ms

MTA-STS

153ms

DNSSEC

249ms

SRV

225ms

Total

1698ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 23:32:40	1698ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-27 18:25:15	1141ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-26 17:03:27	880ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-25 12:03:35	930ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-23 23:27:11	4010ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-08-07 22:29:28	3037ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-07-13 08:38:16	935ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-07-04 18:41:38	9905ms	2 NS 0 A 1 MX	🔒 Secure	View
2026-06-17 14:44:36	2393ms	2 NS 0 A 1 MX	🔒 Secure	View