Walder Wyss

walderwyss.com

Industry: Consulting & audit
Headquarters: Zürich, Zurich
Type: private
Employees (approx.): 550
Checked on: 19 October 2026

70/100Grade B

Protection against forged senders: protected

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

Industry avg.: 66.8 ▲ 3.2
Canton avg.: 53 ▲ 17
Overall avg.: 53.5 ▲ 16.5
Rank 25 of 45 in the industry

Findings

!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: Self-hosted / other
Provider jurisdiction: Switzerland · MX: CH
Detection confidence: 85 / 100
Microsoft tenant: Managed · Walder Wyss AG
Tenant region: EU

Signals (2)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mailgw02.walderwyss.com`	`37.153.83.51`	AS41655 NETCLOUD - Netcloud AG	CH	–
40	`mailgw01.walderwyss.com`	`37.153.83.47`	AS41655 NETCLOUD - Netcloud AG	CH	–

SPF

v=spf1 include:spf.walderwyss.com include:spf.protection.outlook.com include:_spf.web-solutions.io include:_spf.rexx-systems.com -all

all: -all
DNS lookups: 4 / 10
Includes: spf.walderwyss.comspf.protection.outlook.com_spf.web-solutions.io_spf.rexx-systems.com
Detected sending services: Microsoft 365

DMARC

v=DMARC1;p=reject;rua=mailto:support@walderwyss.com;ruf=mailto:support@walderwyss.com;fo=1

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

DKIM

Selector	Key	delegated to
`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.

AppleDocuSignCisco Webex

History

18 October 2026 Score 70 · DMARC reject

All changes of this organisation in the change log →

Raw data

walderwyss.com. IN MX 10 mailgw02.walderwyss.com.
walderwyss.com. IN MX 40 mailgw01.walderwyss.com.
walderwyss.com. IN TXT "v=spf1 include:spf.walderwyss.com include:spf.protection.outlook.com include:_spf.web-solutions.io include:_spf.rexx-systems.com -all"
_dmarc.walderwyss.com. IN TXT "v=DMARC1;p=reject;rua=mailto:support@walderwyss.com;ruf=mailto:support@walderwyss.com;fo=1"

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