Siemens Schweiz

siemens.com

Industry: Machinery & electrical
Headquarters: Zug, Zug
Type: private
Employees (approx.): 5,600
Checked on: 19 October 2026

92/100Grade A

Protection against forged senders: protected

Points per criterion

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

Industry avg.: 62.2 ▲ 29.8
Canton avg.: 63.2 ▲ 28.8
Overall avg.: 53.5 ▲ 38.5
Rank 2 of 112 in the industry

Findings

!DKIM key below 2048 bits

RSA-1024 is considered too weak (RFC 8301, M3AAWG). Rotate to 2048-bit keys.
!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.
iDANE active (TLSA with DNSSEC)

All MX hosts publish TLSA records secured by DNSSEC.
iBIMI with mark certificate (VMC/CMC)

Logo with a verified mark certificate, shown by Gmail and Apple Mail among others. Requires DMARC enforcement.

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 · Siemens AG
Tenant region: EU

Signals (8)

MX	Microsoft 365	`siemens-com.h-v1.mx.microsoft`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-siemens-com._domainkey.siemens.onmicrosoft.com`
Domain verification	Microsoft 365	`MS=ms15950903`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=Mjkm9E3bUvhpoOI`
Domain verification	Amazon	`amazonses:E8V+lV+QDJ+3ZSOIGflGs5r0V2I4Zd`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`siemens-com.h-v1.mx.microsoft`	`52.101.73.145`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	✓ DNSSEC
		`52.101.91.156`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.103.137`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 exists:%{i}.spf.siemens.com include:spf.protection.outlook.com include:all.spf.avature.net include:mail.zendesk.com -all

all: -all
DNS lookups: 4 / 10
Includes: spf.protection.outlook.comall.spf.avature.netmail.zendesk.com
Detected sending services: Microsoft 365, Zendesk

DMARC

v=DMARC1; p=reject; pct=100; rua=mailto:DMARC.rua@siemens.com; aspf=r

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

DKIM

Selector	Key	delegated to
`fm1`	RSA 2048	`fm1-519-siemens-com.dkim.siemens.flowmailer.net`
`fm2`	RSA 2048	`fm2-519-siemens-com.dkim.siemens.flowmailer.net`
`fm3`	RSA 2048	`fm3-521-siemens-com.dkim.siemens.flowmailer.net`
`salesforce`	RSA 1024	`salesforce.wtxxoj.custdkim.salesforce.com`
`selector1`	RSA 1024	`selector1-siemens-com._domainkey.siemens.onmicrosoft.com`
`selector2`	RSA 2048	`selector2-siemens-com._domainkey.siemens.onmicrosoft.com`
`sf1`	RSA 2048	`sf1.hwe6qv.custdkim.salesforce.com`
`sf2`	RSA 2048	`sf2.jxy1h3.custdkim.salesforce.com`
`sfdc`	RSA 1024	`sfdc.xn08i8.custdkim.salesforce.com`

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

Transport encryption

MTA-STS: missing
DANE: active
DNSSEC: active
TLS-RPT: missing
BIMI: VMC/CMC ✓ · Logo

Verified services

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

Microsoft 365GoogleAppleMeta/FacebookAtlassianAdobeCisco WebexAmazon SESOneTrustFigmaSmartsheet

History

18 October 2026 Score 92 · DMARC reject

All changes of this organisation in the change log →

Raw data

siemens.com. IN MX 10 siemens-com.h-v1.mx.microsoft.
siemens.com. IN TXT "v=spf1 exists:%{i}.spf.siemens.com include:spf.protection.outlook.com include:all.spf.avature.net include:mail.zendesk.com -all"
_dmarc.siemens.com. IN TXT "v=DMARC1; p=reject; pct=100; rua=mailto:DMARC.rua@siemens.com; aspf=r"
default._bimi.siemens.com. IN TXT "v=BIMI1; l=https://assets.new.siemens.com/siemens/assets/api/uuid:01254302-7a71-4d1a-ac30-3698acc43591/siemensag2026new.svg; a=…"

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