Gesundheitsdirektorenkonferenz GDK

gdk-cds.ch

Industry: Intercantonal bodies
Headquarters: Bern, Bern
Type: public
Checked on: 19 October 2026

72/100Grade B

Protection against forged senders: largely protected

Points per criterion

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

Industry avg.: 54.8 ▲ 17.2
Canton avg.: 53.1 ▲ 18.9
Overall avg.: 53.5 ▲ 18.5
Rank 3 of 19 in the industry

Findings

!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
Upstream gateway: Abraxas
Provider jurisdiction: USA · MX: CH
Detection confidence: 92 / 100
Microsoft tenant: Managed · CHS
Tenant region: EU

Signals (5)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms55079161`
Domain verification	Google Workspace	`google-site-verification=kceUMPKZT4Ccg9K`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`smtazh01.abxsec.com`	`193.246.95.101`	AS9108 ABXnet - Abraxas Informatik AG	CH	–
20	`smtasg01.abxsec.com`	`193.246.95.121`	AS9108 ABXnet - Abraxas Informatik AG	CH	–

SPF

v=spf1 mx a include:_spf.abxsec.com include:spf.protection.outlook.com ~all

all: ~all
DNS lookups: 4 / 10
Includes: _spf.abxsec.comspf.protection.outlook.com
Detected sending services: Microsoft 365

DMARC

v=DMARC1; p=quarantine; rua=mailto:secsys-rua@abraxas.ch; ruf=mailto:secsys-ruf@abraxas.ch

Policy: p=quarantine
Subdomains (sp): inherits p=quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): secsys-rua@abraxas.ch
Forensic reports (ruf): secsys-ruf@abraxas.ch

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 365GoogleBrevo

History

19 October 2026 Score 72 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

gdk-cds.ch. IN MX 10 smtazh01.abxsec.com.
gdk-cds.ch. IN MX 20 smtasg01.abxsec.com.
gdk-cds.ch. IN TXT "v=spf1 mx a include:_spf.abxsec.com include:spf.protection.outlook.com ~all"
_dmarc.gdk-cds.ch. IN TXT "v=DMARC1; p=quarantine; rua=mailto:secsys-rua@abraxas.ch; ruf=mailto:secsys-ruf@abraxas.ch"

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