Mattig-Suter und Partner

mattig.ch

Industry: Consulting & audit
Headquarters: Schwyz, Schwyz
Type: private
Employees (approx.): 150
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.: 66.8 ▲ 25.2
Canton avg.: 59.7 ▲ 32.3
Overall avg.: 53.5 ▲ 38.5
Rank 4 of 45 in the industry

Findings

!DMARC without reporting (no rua)

Without aggregate reports it stays invisible who sends in the domain's name.
!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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Self-hosted / other
Upstream gateway: SEPPmail
Provider jurisdiction: unclear · MX: CH
Detection confidence: 85 / 100
Microsoft tenant: Managed · Treuhand- und Revisionsgesellschaft Mattig-Suter und Partner
Tenant region: EU

Signals (2)

Domain verification	Microsoft 365	`MS=ms72114037`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mattig-ch.gate.seppmail.cloud`	`86.119.35.35`	AS559 Switch - SWITCH	CH	✓ DNSSEC
10	`mattig-ch.gate.seppmail.cloud`	`217.20.196.81`	AS24951 EVERYWARE-NET - EveryWare AG	CH	✓ DNSSEC

SPF

v=spf1 ip4:93.189.64.0/22 a:mattig.swiss include:_spf.ch.seppmail.cloud include:spf.hostfactory.ch  -all

all: -all
DNS lookups: 3 / 10
Includes: _spf.ch.seppmail.cloudspf.hostfactory.ch
Detected sending services: SEPPmail
IPv4: 1,024 addresses authorised directly

DMARC

v=DMARC1; p=reject; pct=100

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): –

DKIM

Selector	Key	delegated to
`default`	RSA 2048	–

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

Transport encryption

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

Verified services

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

Microsoft 365

History

19 October 2026 Score 92 · DMARC reject

All changes of this organisation in the change log →

Raw data

mattig.ch. IN MX 10 mattig-ch.gate.seppmail.cloud.
mattig.ch. IN TXT "v=spf1 ip4:93.189.64.0/22 a:mattig.swiss include:_spf.ch.seppmail.cloud include:spf.hostfactory.ch  -all"
_dmarc.mattig.ch. IN TXT "v=DMARC1; p=reject; pct=100"

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