🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`smtp2.us.opalstack.com`

DNSSEC	⚠️ Not signed
A	23.106.47.103^{🇺🇸 AS720323.106.44.0/22 Leaseweb USA, Inc.}
MX	`mx1.us.opalstack.com` ⭐
		A	108.62.123.121^{🇺🇸 AS30633108.62.120.0/22}
			PTR	`mx1.us.opalstack.com`
MX	`mx2.us.opalstack.com` ⭐
		A	2605:fe80:2100:bf03:7::2^{🇺🇸 AS72032605:fe80::/32}
			PTR	`mx2.us.opalstack.com`
		A	23.82.16.244^{🇺🇸 AS720323.82.16.0/21}
			PTR	`mx2.us.opalstack.com`
TXT	`v=spf1 include:spf.opalstack.com ~all`

`us.opalstack.com`

	DNSSEC	⚠️ Not signed
	A	142.91.170.22^{🇺🇸 AS7203142.91.168.0/22 Leaseweb USA, Inc.}
	MX	`mx1.us.opalstack.com` ⭐
	MX	`mx2.us.opalstack.com` ⭐
	TXT	`v=spf1 include:spf.opalstack.com ~all`

Same first word

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Previous names

Next names

DNS History

5 records (3 active, 2 former)

○MXmx1.de.opalstack.com2026-08-17 → 2026-10-15 · 35 obs

● 2026-08-17 19:42:00
○ 2026-08-20 02:58:04
● 2026-08-28 19:01:10
○ 2026-08-29 18:29:44
● 2026-08-30 02:03:20
○ 2026-08-30 23:10:12
● 2026-08-31 19:31:28
○ 2026-08-31 22:34:46
● 2026-09-05 07:17:52
○ 2026-09-06 02:02:44
● 2026-09-10 03:35:04
○ 2026-09-11 02:02:58
● 2026-09-13 09:06:30
○ 2026-09-14 02:03:00
● 2026-09-14 23:20:16
○ 2026-09-15 13:52:22
● 2026-09-17 07:08:06
○ 2026-09-17 14:11:16
● 2026-09-18 09:56:20
○ 2026-09-18 13:50:36
● 2026-09-20 05:41:16
○ 2026-09-20 16:19:58
● 2026-09-21 08:39:24
○ 2026-09-22 02:05:22
● 2026-09-26 06:29:42
○ 2026-09-26 11:38:48
● 2026-10-01 07:48:28
○ 2026-10-04 08:36:02
● 2026-10-05 02:28:16
○ 2026-10-05 23:11:18
● 2026-10-10 07:08:08
○ 2026-10-10 12:37:48
● 2026-10-15 07:45:30
○ 2026-10-15 10:38:04
○ 2026-10-16 05:00:34

●MXmx1.us.opalstack.com2026-08-20 → 2026-10-16 · 35 obs

○ 2026-08-17 19:42:00
● 2026-08-20 02:58:04
○ 2026-08-28 19:01:10
● 2026-08-29 18:29:44
○ 2026-08-30 02:03:20
● 2026-08-30 23:10:12
○ 2026-08-31 19:31:28
● 2026-08-31 22:34:46
○ 2026-09-05 07:17:52
● 2026-09-06 02:02:44
○ 2026-09-10 03:35:04
● 2026-09-11 02:02:58
○ 2026-09-13 09:06:30
● 2026-09-14 02:03:00
○ 2026-09-14 23:20:16
● 2026-09-15 13:52:22
○ 2026-09-17 07:08:06
● 2026-09-17 14:11:16
○ 2026-09-18 09:56:20
● 2026-09-18 13:50:36
○ 2026-09-20 05:41:16
● 2026-09-20 16:19:58
○ 2026-09-21 08:39:24
● 2026-09-22 02:05:22
○ 2026-09-26 06:29:42
● 2026-09-26 11:38:48
○ 2026-10-01 07:48:28
● 2026-10-04 08:36:02
○ 2026-10-05 02:28:16
● 2026-10-05 23:11:18
○ 2026-10-10 07:08:08
● 2026-10-10 12:37:48
○ 2026-10-15 07:45:30
● 2026-10-15 10:38:04
● 2026-10-16 05:00:34

○MXmx2.de.opalstack.com2026-08-17 → 2026-10-15 · 35 obs

●MXmx2.us.opalstack.com2026-08-20 → 2026-10-16 · 35 obs

●A23.106.47.1032026-08-17 → 2026-10-16 · 2 obs

● 2026-08-17 19:42:00
● 2026-10-16 05:00:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, d.gtld-servers.net, j.gtld-servers.net, f.gtld-servers.net...	-
opalstack.com	ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com, ns1.de.opalstack.com	4 records

✅ Authoritative Response

Server:139.162.174.250

NS records: ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com, ns1.de.opalstack.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opalstack.com (unsigned zone)

⏱️ Timing

Total: 3527ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.106.47.103`
MX	2	`mx1.us.opalstack.com (pri: 10), mx2.us.opalstack.com (pri: 10)`
TXT	1	`v=spf1 include:spf.opalstack.com ~all`

📌 Glue Records Collected

Total: 4

In-bailiwick: 4 (ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com...)

Analysis

IP Addresses

smtp2.us.opalstack.com resolves to one IP address: 23.106.47.103.

Mail Servers

Mail for smtp2.us.opalstack.com is handled by two mail servers — mx1.us.opalstack.com and mx2.us.opalstack.com.

smtp2.us.opalstack.com uses an identical mail server configuration to several other domains — among them ns3.sg.opalstack.com, microcosmpublishing.com, licenses.fyi and two more.

smtp2.us.opalstack.com shares at least some of its mail servers with other domains, such as symcomputadores.com.

Hostnames that resolve to two IP addresses:

mx2.us.opalstack.com directs traffic to 23.82.16.244 and 2605:fe80:2100:bf03:7::2.

Hosts with just one IP address:

mx1.us.opalstack.com has the IP address 108.62.123.121.

smtp2.us.opalstack.com - robtex.com