Lenz & Staehelin

lenzstaehelin.com

Industry: Consulting & audit
Headquarters: Genève, Geneva
Type: private
Employees (approx.): 450
Checked on: 19 October 2026

42/100Grade C

Protection against forged senders: largely protected

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 0 / 20
DMARC 19 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 66.8 ▼ 24.8
Canton avg.: 51.9 ▼ 9.9
Overall avg.: 53.5 ▼ 11.5
Rank 42 of 45 in the industry

Findings

!No DKIM key found

No key was found under more than 100 common selectors. A custom selector is possible, but without DKIM there is no cryptographic sender check.
!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 · Lenz & Staehelin
Tenant region: EU

Signals (3)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
Network	Swisscom	`AS3303 SWISSCOM - Swisscom (Schweiz) AG`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`smtp1.lenzstaehelin.com`	`217.193.194.10`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
50	`smtp2.lenzstaehelin.com`	`212.243.107.69`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–

SPF

v=spf1 mx include:_spf.plan-net.swiss a:mailrelay.snowflakehosting.ch a:mailrelay03.ops.opsserver.ch ip4:91.199.98.57 ip6:2a04:503:0:102::57 include:spf.protection.outlook.com include:spf.vx-email.com ~all

all: ~all
DNS lookups: 6 / 10
Includes: _spf.plan-net.swissspf.protection.outlook.comspf.vx-email.com
Detected sending services: Microsoft 365
IPv4: 1 addresses authorised directly

DMARC

v=DMARC1; p=quarantine; rua=mailto:postmaster@lenzstaehelin.com

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

DKIM

No DKIM key found

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.

Cisco Webex

History

18 October 2026 Score 42 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

lenzstaehelin.com. IN MX 10 smtp1.lenzstaehelin.com.
lenzstaehelin.com. IN MX 50 smtp2.lenzstaehelin.com.
lenzstaehelin.com. IN TXT "v=spf1 mx include:_spf.plan-net.swiss a:mailrelay.snowflakehosting.ch a:mailrelay03.ops.opsserver.ch ip4:91.199.98.57 ip6:2a04:503:0:102::57 include:spf.protection.outlook.com include:spf.vx-email.com ~all"
_dmarc.lenzstaehelin.com. IN TXT "v=DMARC1; p=quarantine; rua=mailto:postmaster@lenzstaehelin.com"

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