Erne Gruppe

erne.ch

Industry: Construction & real estate
Headquarters: Laufenburg, Aargau
Type: private
Employees (approx.): 1,000
Checked on: 19 October 2026

55/100Grade C

Protection against forged senders: not protected

Points per criterion

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

Industry avg.: 58.2 ▼ 3.2
Canton avg.: 57.3 ▼ 2.3
Overall avg.: 53.5 ▲ 1.5
Rank 37 of 67 in the industry

Findings

✕No DMARC record

Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.
!SPF close to the 10-lookup limit (8)

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.
!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 · ERNE AG
Tenant region: EU

Signals (7)

MX	Microsoft 365	`erne-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms37210696`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
SPF	Swisscom	`include:spf.appmail.swisscom.com`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`erne-ch.mail.protection.outlook.com`	`52.101.68.29`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.103.140`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.73.145`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 ip4:193.5.116.226 ip4:195.141.91.45 ip4:195.141.91.42 ip4:93.189.64.0/22 include:spf.sendinblue.com include:spf.protection.outlook.com include:spf.cs2.ch include:spf.abacuscity.ch include:spf.umantis.com include:spf.appmail.swisscom.com  include:spf.cloud.ci-solution.com -all

all: -all
DNS lookups: 8 / 10
Includes: spf.sendinblue.comspf.protection.outlook.comspf.cs2.chspf.abacuscity.chspf.umantis.comspf.appmail.swisscom.comspf.cloud.ci-solution.com
Detected sending services: Brevo, Microsoft 365, Swisscom
IPv4: 1,027 addresses authorised directly

DMARC

Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.

DKIM

Selector	Key	delegated to
`mail`	RSA 1024	–

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 365AppleBrevoTeamViewer

History

18 October 2026 Score 55 · DMARC -

All changes of this organisation in the change log →

Raw data

erne.ch. IN MX 10 erne-ch.mail.protection.outlook.com.
erne.ch. IN TXT "v=spf1 ip4:193.5.116.226 ip4:195.141.91.45 ip4:195.141.91.42 ip4:93.189.64.0/22 include:spf.sendinblue.com include:spf.protection.outlook.com include:spf.cs2.ch include:spf.abacuscity.ch include:spf.umantis.com include:spf.appmail.swisscom.com  include:spf.cloud.ci-solution.com -all"

More from this industry

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