Helbling

helbling.ch

Industry: Consulting & audit
Headquarters: Zürich, Zurich
Type: private
Employees (approx.): 600
Checked on: 19 October 2026

80/100Grade 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 10 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 66.8 ▲ 13.2
Canton avg.: 53 ▲ 27
Overall avg.: 53.5 ▲ 26.5
Rank 8 of 45 in the industry

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.
!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
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Managed · Helbling Holding AG
Tenant region: EU

Signals (8)

MX	Microsoft 365	`helbling-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-helbling-ch._domainkey.helblinggroup.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms59030361`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=B7FSl_nl3eHZJxm`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`helbling-ch.mail.protection.outlook.com`	`52.101.209.28`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.103.36`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.185.21`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 ip4:94.154.9.0/24 include:spf.protection.outlook.com -all

all: -all
DNS lookups: 1 / 10
Includes: spf.protection.outlook.com
Detected sending services: Microsoft 365
IPv4: 256 addresses authorised directly

DMARC

v=DMARC1; p=reject; rua=mailto:it.notify.dmarc@helbling.ch; ruf=mailto:it.notify.dmarc@helbling.ch; sp=none; ri=86400

Policy: p=reject
Subdomains (sp): none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): it.notify.dmarc@helbling.ch
Forensic reports (ruf): it.notify.dmarc@helbling.ch

DKIM

Selector	Key	delegated to
`selector1`	RSA 2048	`selector1-helbling-ch._domainkey.helblinggroup.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-helbling-ch._domainkey.helblinggroup.onmicrosoft.com`

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

Transport encryption

MTA-STS: missing
DANE: missing
DNSSEC: active
TLS-RPT: missing
BIMI: missing

Verified services

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

Microsoft 365GoogleAtlassianGlobalSign

History

19 October 2026 Score 80 · DMARC reject

All changes of this organisation in the change log →

Raw data

helbling.ch. IN MX 10 helbling-ch.mail.protection.outlook.com.
helbling.ch. IN TXT "v=spf1 ip4:94.154.9.0/24 include:spf.protection.outlook.com -all"
_dmarc.helbling.ch. IN TXT "v=DMARC1; p=reject; rua=mailto:it.notify.dmarc@helbling.ch; ruf=mailto:it.notify.dmarc@helbling.ch; sp=none; ri=86400"

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