🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`mail.de.opalstack.com`

DNSSEC	⚠️ Not signed
A	78.159.112.195^{🇩🇪 LEASEWEB-DE-FRA-1078.159.96.0/19 Leaseweb DE}
		PTR	`imap1.de.opalstack.com`
A	78.159.115.240^{🇩🇪 LEASEWEB-DE-FRA-1078.159.96.0/19 Leaseweb DE}
MX	`mx1.us.opalstack.com` ⭐
		A	108.62.123.121^{🇺🇸 LEASEWEB-US108.62.120.0/22 Leaseweb USA, Inc.}
			PTR	`mx1.us.opalstack.com`
MX	`mx2.us.opalstack.com` ⭐
		A	2605:fe80:2100:bf03:7::2^{🇺🇸 AS72032605:fe80::/32 Leaseweb USA, Inc. SFO-12 US}
			PTR	`mx2.us.opalstack.com`
		A	23.82.16.244^{🇺🇸 AS720323.82.16.0/21 Leaseweb USA, Inc.}
			PTR	`mx2.us.opalstack.com`
TXT	`v=spf1 include:spf.opalstack.com ~all`

`de.opalstack.com`

	DNSSEC	⚠️ Not signed
	A	172.104.205.51^{🇺🇸 AKAMAI-LINODE-AP172.104.205.0/24 Akamai Technologies}
	MX	`mx1.us.opalstack.com` ⭐
	MX	`mx2.us.opalstack.com` ⭐
	TXT	`v=spf1 include:spf.opalstack.com ~all`

MX for

coherentkarst.com

Same first word

mail.loginto.me

mail.int.in

mail.quest

mail.kr.eu.org

mail.bio

mail.dk

mail.uzhhorod.ua

mail.main.jp

mail.graphics

mail.org.ph

mail.fashion

mail.pl.eu.org

mail.design

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mail.city

mail.yt

mail.net.uz

mail.watch

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mail.gov.af

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mail.net.mk

mail.5g.in

mail.freedesktop.org

mail.wiki

mail.us.eu.org

mail.direct

mail.photo

mail.yandex

mail.sh.cn

mail.holdings

mail.vacations

mail.my

mail.abogado

mail.us.kg

mail.gov.mz

mail.gov.ph

mail.org.il

mail.veterinaire.fr

mail.ee

mail.yokohama

mail.mu

mail.nflfan.org

mail.bayern

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mail.co.nl

mail.dnsalias.com

mail.com.tr

mail.ai

mail.money

mail.me.ke

mail.org.ru

mail.vpndns.net

mail.re

mail.credit

mail.pl

mail.co.com

mail.perspecta.cloud

mail.ac.id

mail.rs

mail.nu

mail.barcelona

mail.codes

mail.london

mail.ddns.net

mail.ovh

mail.net.kg

mail.qualifioapp.com

mail.photography

mail.net.au

mail.miami

mail.storage

mail.me.eu.org

mail.energy

mail.mods.jp

mail.taxi

mail.ras.ru

mail.ls

mail.app

mail.co.kr

mail.rv.ua

mail.frl

mail.org.im

mail.gripe

mail.academy

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mail.bh

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mail.site

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mail.email

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Previous names

imap1.de.opalstack.com

imap2.de.opalstack.com

mail.mail.opalintherough.com

mail.mail.opalrush.com

mx.mail.opallius.com

selector1._domainkey.opalinvest.com

Next names

DNS History

10 records (4 active, 6 former)

○NSns1.de.opalstack.com2026-05-05 → 2026-10-17 · 2 obs

○ 2026-05-05 11:48:48
○ 2026-10-17 03:49:20

○NSns1.us.opalstack.com2026-05-05 → 2026-10-17 · 2 obs

○ 2026-05-05 11:48:48
○ 2026-10-17 03:49:20

○NSns2.us.opalstack.com2026-05-05 → 2026-10-17 · 2 obs

○ 2026-05-05 11:48:48
○ 2026-10-17 03:49:20

○NSns3.us.opalstack.com2026-05-05 → 2026-10-17 · 2 obs

○ 2026-05-05 11:48:48
○ 2026-10-17 03:49:20

○MXmx1.de.opalstack.com2026-08-17 → 2026-10-15 · 34 obs

○ 2026-05-05 11:48:48
● 2026-08-17 16:29:58
○ 2026-08-19 04:30:40
● 2026-08-23 14:21:00
○ 2026-08-27 03:06:46
● 2026-08-28 03:08:36
○ 2026-08-28 19:01:06
● 2026-08-29 18:29:44
○ 2026-08-29 21:51:32
● 2026-08-31 07:00:10
○ 2026-08-31 19:31:28
● 2026-09-01 00:45:28
○ 2026-09-02 01:37:12
● 2026-09-06 02:02:44
○ 2026-09-07 18:46:52
● 2026-09-11 23:04:34
○ 2026-09-14 02:03:02
● 2026-09-17 16:19:34
○ 2026-09-18 03:41:48
● 2026-09-18 09:56:22
○ 2026-09-19 01:39:16
● 2026-09-21 08:39:22
○ 2026-09-22 02:05:14
● 2026-09-25 13:46:04
○ 2026-09-26 06:29:42
● 2026-10-01 07:48:32
○ 2026-10-05 02:28:12
● 2026-10-09 14:48:34
○ 2026-10-10 07:08:12
● 2026-10-14 12:15:44
○ 2026-10-15 06:20:12
● 2026-10-15 17:42:00
○ 2026-10-16 22:21:26
○ 2026-10-17 03:49:20

●MXmx1.us.opalstack.com2026-05-05 → 2026-10-17 · 34 obs

● 2026-05-05 11:48:48
○ 2026-08-17 16:29:58
● 2026-08-19 04:30:40
○ 2026-08-23 14:21:00
● 2026-08-27 03:06:46
○ 2026-08-28 03:08:36
● 2026-08-28 19:01:06
○ 2026-08-29 18:29:44
● 2026-08-29 21:51:32
○ 2026-08-31 07:00:10
● 2026-08-31 19:31:28
○ 2026-09-01 00:45:28
● 2026-09-02 01:37:12
○ 2026-09-06 02:02:44
● 2026-09-07 18:46:52
○ 2026-09-11 23:04:34
● 2026-09-14 02:03:02
○ 2026-09-17 16:19:34
● 2026-09-18 03:41:48
○ 2026-09-18 09:56:22
● 2026-09-19 01:39:16
○ 2026-09-21 08:39:22
● 2026-09-22 02:05:14
○ 2026-09-25 13:46:04
● 2026-09-26 06:29:42
○ 2026-10-01 07:48:32
● 2026-10-05 02:28:12
○ 2026-10-09 14:48:34
● 2026-10-10 07:08:12
○ 2026-10-14 12:15:44
● 2026-10-15 06:20:12
○ 2026-10-15 17:42:00
● 2026-10-16 22:21:26
● 2026-10-17 03:49:20

○MXmx2.de.opalstack.com2026-08-17 → 2026-10-15 · 34 obs

●MXmx2.us.opalstack.com2026-05-05 → 2026-10-17 · 34 obs

●A78.159.112.1952026-05-05 → 2026-10-17 · 2 obs

● 2026-05-05 11:48:48
● 2026-10-17 03:49:20

●A78.159.115.2402026-05-05 → 2026-10-17 · 2 obs

● 2026-05-05 11:48:48
● 2026-10-17 03:49:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, j.gtld-servers.net, g.gtld-servers.net, a.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:23.92.21.232

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: 3294ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`78.159.115.240, 78.159.112.195`
MX	2	`mx2.us.opalstack.com (pri: 10), mx1.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

Mail Server Role

coherentkarst.com uses mail.de.opalstack.com as a mail server.

mail.eu.opalstack.com and mail.us.opalstack.com tend to appear as mail servers in combination with mail.de.opalstack.com.

IP Addresses

mail.de.opalstack.com points to the IP addresses 78.159.112.195 and 78.159.115.240

Further host names like imap2.de.opalstack.com and imap1.de.opalstack.com overlap in IP numbers with mail.de.opalstack.com.

Mail Servers

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

mail.de.opalstack.com uses an identical mail server configuration to several other domains — among them westendfiji.com, infinitoserviciosopticos.com, unsanctioned-development.net and two more.

Hostnames that resolve to two IP addresses:

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

Hosts with just one IP address:

mx1.us.opalstack.com resolves to 108.62.123.121.

mail.de.opalstack.com - robtex.com