`mail.rnicrosoftsecurity.com`

DNSSEC	⚠️ Not signed
A	144.91.70.75^{🇩🇪 CONTABO144.91.70.0/23}
		PTR	`vmi3024488.contaboserver.net`

`rnicrosoftsecurity.com`

	DNSSEC	⚠️ Not signed
	A	144.91.70.75^{🇩🇪 CONTABO144.91.70.0/23}
	NS	`ns1.contabo.net` ⭐
	NS	`ns2.contabo.net`
	NS	`ns3.contabo.net`
	MX	`mail.rnicrosoftsecurity.com` ⭐
	TXT	`v=spf1 mx ip4:144.91.70.75 -all`
	SOA	`ns1.contabo.net`hostmaster@contabo.de serial=1774810227

⚠️ On DNS blocklist: tif

MX for

rnicrosoftsecurity.com

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DNS History

1 record (1 active, 0 former)

●A144.91.70.752026-03-29 → 2026-03-29 · 2 obs

● 2026-03-29 08:46:34
● 2026-03-29 18:50:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, f.gtld-servers.net, e.gtld-servers.net, a.gtld-servers.net...	-
rnicrosoftsecurity.com	ns1.contabo.net, ns2.contabo.net, ns3.contabo.net	-

✅ Authoritative Response

Server:209.126.15.15

NS records: ns1.contabo.net, ns2.contabo.net, ns3.contabo.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rnicrosoftsecurity.com (unsigned zone)

⏱️ Timing

Total: 524ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`144.91.70.75`

Analysis

Mail Server Role

The mail server for rnicrosoftsecurity.com is mail.rnicrosoftsecurity.com.

IP Addresses

mail.rnicrosoftsecurity.com points to a single IP number: 144.91.70.75.

Other host names such as www.rnicrosoftsecurity.com and rnicrosoftsecurity.com share IP numbers with mail.rnicrosoftsecurity.com.

mail.rnicrosoftsecurity.com - robtex.com