Rafael Pfister
+41 58 510 22 08 Consulting

Kistler

kistler.com

Industry
Machinery & electrical
Headquarters
Winterthur, Zurich
Type
private
Employees (approx.)
2,200
Checked on
19 October 2026
70/100Grade B

Protection against forged senders: protected, with a gap: subdomains not protected (sp=none)

Points per criterion

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

Findings

  • !Subdomains unprotected (sp=none)

    The main domain is protected, but subdomains such as invoice.company.ch can still be forged.

  • !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 MTA-STS

    Without MTA-STS (or DANE) inbound encryption is not enforced; an attacker on the path can downgrade to plain text.

  • !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
Upstream gateway
Cisco Secure Email
Provider jurisdiction
USA · MX: US
Detection confidence
90 / 100
Microsoft tenant
Federated · Kistler Instrumente AG
Tenant region
EU
Federated via
fs.int.kistler.com
Signals (4)
SPFMicrosoft 365include:spf.protection.outlook.com
Domain verificationMicrosoft 365MS=ms41323845
Domain verificationGoogle Workspacegoogle-site-verification=i1SzmjvVZupHzvP
Entra IDMicrosoft 365Entra-ID-Tenant (Federated)

MX servers

PrefHostIPNetworkCountryTLSA
5 mx1.hc1803-32.eu.iphmx.com 194.165.193.226 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US –
194.165.205.11 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US
7 mx2.hc1803-32.eu.iphmx.com 194.165.205.11 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US –
194.165.193.226 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US
20 mx1.kistler.com 194.165.205.11 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US –
30 mx2.kistler.com 194.165.205.11 AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division US –

SPF

v=spf1 mx ip4:194.165.193.227 ip4:20.79.220.33 ip4:20.79.222.204 ip4:13.94.95.171 ip4:91.223.79.122 ip4:137.116.240.241 ip4:194.165.205.24 ip4:91.223.79.47 ip4:204.14.234.64/28 ip4:204.14.232.64/28 ip4:182.50.78.64/28 ip4:96.43.144.64/31 ip4:96.43.148.64/31 ip4:104.47.17.105 exists:%{i}.spf.hc1803-32.eu.iphmx.com exists:%{i}._spf.mta.salesforce.com include:_spf-sfdc.sapsf.eu include:_spf-dc12.successfactors.com include:spf.protection.outlook.com -all
all
-all
DNS lookups
6 / 10
Includes
_spf-sfdc.sapsf.eu_spf-dc12.successfactors.comspf.protection.outlook.com
Detected sending services
SAP, Microsoft 365
IPv4
61 addresses authorised directly

DMARC

v=DMARC1; p=reject; sp=none; rua=mailto:dmarc@kistler.com; pct=100; ri=86400
Policy
p=reject
Subdomains (sp)
none
Share (pct)
100 %
Alignment DKIM/SPF
relaxed / relaxed
Aggregate reports (rua)
dmarc@kistler.com

DKIM

SelectorKeydelegated to
mail RSA 1024 –
selector1 RSA 2048 –

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

Transport encryption

MTA-STS
missing
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 365GoogleAppleCisco WebexMiroBrevo

History

  • Score 70 · DMARC reject

All changes of this organisation in the change log →

Raw data 
kistler.com. IN MX 5 mx1.hc1803-32.eu.iphmx.com.
kistler.com. IN MX 7 mx2.hc1803-32.eu.iphmx.com.
kistler.com. IN MX 20 mx1.kistler.com.
kistler.com. IN MX 30 mx2.kistler.com.
kistler.com. IN TXT "v=spf1 mx ip4:194.165.193.227 ip4:20.79.220.33 ip4:20.79.222.204 ip4:13.94.95.171 ip4:91.223.79.122 ip4:137.116.240.241 ip4:194.165.205.24 ip4:91.223.79.47 ip4:204.14.234.64/28 ip4:204.14.232.64/28 ip4:182.50.78.64/28 ip4:96.43.144.64/31 ip4:96.43.148.64/31 ip4:104.47.17.105 exists:%{i}.spf.hc1803-32.eu.iphmx.com exists:%{i}._spf.mta.salesforce.com include:_spf-sfdc.sapsf.eu include:_spf-dc12.successfactors.com include:spf.protection.outlook.com -all"
_dmarc.kistler.com. IN TXT "v=DMARC1; p=reject; sp=none; rua=mailto:dmarc@kistler.com; pct=100; ri=86400"

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