Swiss Automotive Group (Derendinger)

derendinger.ch

Industry: Automotive retail
Headquarters: Wallisellen, Zurich
Type: private
Employees (approx.): 1,500
Checked on: 19 October 2026

73/100Grade B

Protection against forged senders: largely protected

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 20 / 20
DMARC 19 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 6 / 15
TLS-RPT 5 / 5

Industry avg.: 50.2 ▲ 22.8
Canton avg.: 53 ▲ 20
Overall avg.: 53.5 ▲ 19.5
Rank 1 of 9 in the industry

Findings

!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.
!MTA-STS in testing mode only

mode: testing reports failures but enforces nothing.

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 · SAG Management International AG
Tenant region: EU

Signals (8)

MX	Microsoft 365	`derendinger-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-derendinger-ch._domainkey.sagag.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=BXOqWMO8h_GCacH`
SPF	Amazon	`include:amazonses.com`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
0	`derendinger-ch.mail.protection.outlook.com`	`52.101.68.27`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.209.31`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.68.21`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 a ip4:195.182.12.0/24 include:spf.protection.outlook.com include:spf.mandrillapp.com ip4:212.103.71.210 ip4:216.221.161.14 ip4:216.221.161.15 ip4:76.223.133.25 ip4:76.223.133.26 include:_spf.atlassian.net include:_spf.rexx-systems.com include:_spf.qualtrics.com ~all

all: ~all
DNS lookups: 7 / 10
Includes: spf.protection.outlook.comspf.mandrillapp.com_spf.atlassian.net_spf.rexx-systems.com_spf.qualtrics.com
Detected sending services: Microsoft 365, Mailchimp/Mandrill, Mailchimp Transactional, Atlassian, Amazon SES, Qualtrics
IPv4: 261 addresses authorised directly

DMARC

v=DMARC1; p=quarantine; rua=mailto:90wskagyc2@rua.powerdmarc.com; ruf=mailto:90wskagyc2@ruf.powerdmarc.com;

Policy: p=quarantine
Subdomains (sp): inherits p=quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): 90wskagyc2@rua.powerdmarc.com
Forensic reports (ruf): 90wskagyc2@ruf.powerdmarc.com
Report services: PowerDMARC

DKIM

Selector	Key	delegated to
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`mail`	RSA 1024	–
`mandrill`	RSA 1024	–
`selector1`	RSA 2048	`selector1-derendinger-ch._domainkey.sagag.onmicrosoft.com`
`selector2`	RSA 2048	`selector2-derendinger-ch._domainkey.sagag.onmicrosoft.com`

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

Transport encryption

MTA-STS: Mode: testing · max_age: 86,400 s · covers all MX: yes
mx: derendinger-ch.mail.protection.outlook.com
DANE: missing
DNSSEC: missing
TLS-RPT: mailto:90wskagyc2@tls.powerdmarc.com
BIMI: missing

Verified services

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

GoogleAtlassianOneTrustBrevo

History

18 October 2026 Score 73 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

derendinger.ch. IN MX 0 derendinger-ch.mail.protection.outlook.com.
derendinger.ch. IN TXT "v=spf1 a ip4:195.182.12.0/24 include:spf.protection.outlook.com include:spf.mandrillapp.com ip4:212.103.71.210 ip4:216.221.161.14 ip4:216.221.161.15 ip4:76.223.133.25 ip4:76.223.133.26 include:_spf.atlassian.net include:_spf.rexx-systems.com include:_spf.qualtrics.com ~all"
_dmarc.derendinger.ch. IN TXT "v=DMARC1; p=quarantine; rua=mailto:90wskagyc2@rua.powerdmarc.com; ruf=mailto:90wskagyc2@ruf.powerdmarc.com;"
_mta-sts.derendinger.ch. IN TXT "v=STSv1; id=20260622131743321839"
_smtp._tls.derendinger.ch. IN TXT "v=TLSRPTv1; rua=mailto:90wskagyc2@tls.powerdmarc.com"

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