sisden.dk DNS records

🖥️ Nameservers2 records 142ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.messagingengine.com	162.159.24.178	ns1.messagingengine.com	AS13335 Cloudflare, Inc.
ns2.messagingengine.com	162.159.25.191	ns2.messagingengine.com	AS13335 Cloudflare, Inc.

🌍 A Records2 records 123ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
103.168.172.37	3600s	www.messagingengine.com	AS151847	Fastmail Pty Ltd	103.168.172.0/24	🇺🇸 United States	Philadelphia
103.168.172.52	3600s	www.messagingengine.com	AS151847	Fastmail Pty Ltd	103.168.172.0/24	🇺🇸 United States	Philadelphia

📧 MX Records2 records 148ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	eu1-smtp.messagingengine.com	204.75.18.216 204.75.18.217	ams-mx-01.messagingengine.com ams-mx-02.messagingengine.com	AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd
20	3600s	eu2-smtp.messagingengine.com	103.168.172.216 103.168.172.217 103.168.172.218 103.168.172.219 103.168.172.220 103.168.172.221 103.168.172.222 103.168.172.223	phl-mx-01.messagingengine.com phl-mx-02.messagingengine.com phl-mx-03.messagingengine.com phl-mx-04.messagingengine.com phl-mx-05.messagingengine.com phl-mx-06.messagingengine.com phl-mx-07.messagingengine.com phl-mx-08.messagingengine.com	AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd AS151847 Fastmail Pty Ltd

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	103.168.172.37
🔶 Autoconfig	103.168.172.37

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 370ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	1	443	autodiscover.fastmail.com
_imaps._tcp	0	1	993	imap.fastmail.com

📝 TXT Records1 records 1145ms

TXT Record
v=spf1 include:spf.messagingengine.com ?all

✉️ SPF

Policy	Record (sisden.dk)
?all (neutral)	v=spf1 include:spf.messagingengine.com ?all

📨 DMARC

Policy	Record (_dmarc.sisden.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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

🔗 TLSA / DANE

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

🔐 DNSSEC2090ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026080500
Primary NS (MNAME)	ns1.messagingengine.com
Responsible (RNAME)	postmaster@messagingengine.com
Refresh	86247s
Retry	600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

142ms

A

123ms

MX

148ms

AAAA

149ms

TXT

1145ms

CAA

165ms

HTTPS

140ms

TLSA

252ms

SOA

0ms

MTA-STS

337ms

DNSSEC

2090ms

SRV

370ms

Total

3076ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 09:54:24	3076ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-07 07:41:59	33451ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-05 05:02:43	3667ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-07-06 01:44:24	2351ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-07-03 10:05:31	7296ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-28 14:15:22	3687ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-22 02:42:17	1451ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-18 02:42:06	1955ms	2 NS 2 A 2 MX	🔓 Insecure	View