Cablex

cablex.ch

Industry: Telecom, IT & media
Headquarters: Bern, Bern
Type: private
Employees (approx.): 1,300
Checked on: 19 October 2026

29/100Grade D

Protection against forged senders: not protected (monitoring only)

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 0 / 20
DMARC 6 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 63.6 ▼ 34.6
Canton avg.: 53.1 ▼ 24.1
Overall avg.: 53.5 ▼ 24.5
Rank 50 of 50 in the industry

Findings

✕DMARC in monitoring mode only (p=none)

p=none provides reports but does not reject a single forgery. The goal is p=reject.
!External report receiver not authorised

The authorisation record for an external rua domain is missing (RFC 7489 §7.1); many receivers then send no reports.
!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: Swisscom
Upstream gateway: Swisscom Mail Security
Provider jurisdiction: Switzerland · MX: CH
Detection confidence: 92 / 100
Microsoft tenant: Federated · Swisscom
Tenant region: EU
Federated via: sts.swisscom.com

Signals (5)

Domain verification	Microsoft 365	`MS=ms39926922`
MX	Swisscom	`mail.swisscom.com`
SPF	Swisscom	`include:spf.swisscom.com`
Network	Swisscom	`AS3303 SWISSCOM - Swisscom (Schweiz) AG`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Federated)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mail.swisscom.com`	`138.188.184.33`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
10	`mail.swisscom.com`	`138.188.176.225`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
20	`mail10.swisscom.com`	`138.188.176.225`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
20	`mail20.swisscom.com`	`138.188.184.33`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–

SPF

v=spf1 include:spf.swisscom.com include:spf.appmail.swisscom.com ~all

all: ~all
DNS lookups: 2 / 10
Includes: spf.swisscom.comspf.appmail.swisscom.com
Detected sending services: Swisscom

DMARC

v=DMARC1; p=none; pct=100; rua=mailto:reports-rua@swisscom.com; ruf=mailto:reports-ruf@swisscom.com;

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): reports-rua@swisscom.com
Forensic reports (ruf): reports-ruf@swisscom.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.

Microsoft 365AppleAdobeOneTrustMiroCanva

History

19 October 2026 Score 29 · DMARC none

All changes of this organisation in the change log →

Raw data

cablex.ch. IN MX 10 mail.swisscom.com.
cablex.ch. IN MX 20 mail10.swisscom.com.
cablex.ch. IN MX 20 mail20.swisscom.com.
cablex.ch. IN TXT "v=spf1 include:spf.swisscom.com include:spf.appmail.swisscom.com ~all"
_dmarc.cablex.ch. IN TXT "v=DMARC1; p=none; pct=100; rua=mailto:reports-rua@swisscom.com; ruf=mailto:reports-ruf@swisscom.com;"

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