Jansen

jansen.com

Industry: Building materials
Headquarters: Oberriet, St. Gallen
Type: private
Employees (approx.): 1,000
Checked on: 19 October 2026

82/100Grade B

Protection against forged senders: protected

Points per criterion

MX 10 / 10
SPF 15 / 15
DKIM 20 / 20
DMARC 25 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 12 / 15
TLS-RPT 0 / 5

Industry avg.: 60.3 ▲ 21.7
Canton avg.: 52.3 ▲ 29.7
Overall avg.: 53.5 ▲ 28.5
Rank 1 of 20 in the industry

Findings

!SPF close to the 10-lookup limit (9)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!DKIM key below 2048 bits

RSA-1024 is considered too weak (RFC 8301, M3AAWG). Rotate to 2048-bit keys.
!DNSSEC not enabled

Without DNSSEC, DNS answers can be forged in transit. DANE requires DNSSEC.
!No TLS reporting (TLS-RPT)

Without TLS-RPT the organisation does not learn when senders fail to deliver encrypted.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Managed · Jansen AG
Tenant region: EU

Signals (8)

MX	Microsoft 365	`jansen-com.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-jansen-com._domainkey.jansengroup.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms86125194`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=XNu4IZtdmFrafys`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
0	`jansen-com.mail.protection.outlook.com`	`52.101.209.31`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.73.123`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.68.25`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 a:mailoutbound-1.jansen.com a:mailoutbound-2.jansen.com a:mx01.rexx-systems.de include:_spf.senders.scnem.com include:spf.sosafe.de include:_spf.123formbuilder.com include:_spf.rexx-suite.com include:spf.protection.outlook.com -all

all: -all
DNS lookups: 9 / 10
Includes: _spf.senders.scnem.comspf.sosafe.de_spf.123formbuilder.com_spf.rexx-suite.comspf.protection.outlook.com
Detected sending services: Microsoft 365

DMARC

v=DMARC1; p=reject; rua=mailto:dmarc@jansen.com

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc@jansen.com

DKIM

Selector	Key	delegated to
`selector1`	RSA 1024	`selector1-jansen-com._domainkey.jansengroup.onmicrosoft.com`

Checked: 100 common selectors. Keys under custom selectors remain invisible.

Transport encryption

MTA-STS: Mode: enforce · max_age: 604,800 s · covers all MX: yes
mx: *.mail.protection.outlook.com
DANE: missing
DNSSEC: missing
TLS-RPT: missing
BIMI: missing

Verified services

From verification records in the domain TXT: services where the domain is verified.

Microsoft 365GoogleAppleAdobeMiroFigmaAutodeskTeamViewer

History

19 October 2026 Score 82 · DMARC reject

All changes of this organisation in the change log →

Raw data

jansen.com. IN MX 0 jansen-com.mail.protection.outlook.com.
jansen.com. IN TXT "v=spf1 a:mailoutbound-1.jansen.com a:mailoutbound-2.jansen.com a:mx01.rexx-systems.de include:_spf.senders.scnem.com include:spf.sosafe.de include:_spf.123formbuilder.com include:_spf.rexx-suite.com include:spf.protection.outlook.com -all"
_dmarc.jansen.com. IN TXT "v=DMARC1; p=reject; rua=mailto:dmarc@jansen.com"
_mta-sts.jansen.com. IN TXT "v=STSv1; id=20250304122900Z"

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