CTA

cta.ch

Industry: Construction & real estate
Headquarters: Münsingen, Bern
Type: private
Employees (approx.): 300
Checked on: 19 October 2026

61/100Grade C

Protection against forged senders: not protected (monitoring only)

Points per criterion

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

Industry avg.: 58.2 ▲ 2.8
Canton avg.: 53.1 ▲ 7.9
Overall avg.: 53.5 ▲ 7.5
Rank 32 of 67 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.
!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: Barracuda
Provider jurisdiction: USA · MX: US
Detection confidence: 99 / 100
Microsoft tenant: Managed · CTA AG
Tenant region: EU

Signals (6)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-cta-ch._domainkey.ctaagschweiz.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Google Workspace	`google-site-verification=rZsFIOMpNlZAYj7`
Network	Amazon	`AS16509 AMAZON-02 - Amazon.com, Inc.`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`d307724.b.ess.de.barracudanetworks.com`	`18.185.115.251`	AS16509 AMAZON-02 - Amazon.com, Inc.	US	–
		`18.185.115.252`	AS16509 AMAZON-02 - Amazon.com, Inc.	US
		`18.185.115.250`	AS16509 AMAZON-02 - Amazon.com, Inc.	US
20	`d307724.a.ess.de.barracudanetworks.com`	`18.185.115.251`	AS16509 AMAZON-02 - Amazon.com, Inc.	US	–
		`18.185.115.250`	AS16509 AMAZON-02 - Amazon.com, Inc.	US
		`18.185.115.252`	AS16509 AMAZON-02 - Amazon.com, Inc.	US

SPF

v=spf1 include:spf.protection.outlook.com include:spf.ess.de.barracudanetworks.com include:_spf.psm.knowbe4.com a:mail01.refline.ch a:mail02.refline.ch mx include:spf.crsend.com -all

all: -all
DNS lookups: 7 / 10
Includes: spf.protection.outlook.comspf.ess.de.barracudanetworks.com_spf.psm.knowbe4.comspf.crsend.com
Detected sending services: Microsoft 365

DMARC

v=DMARC1; p=none; rua=mailto:dmarc-reporting@cta.ch;

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc-reporting@cta.ch

DKIM

Selector	Key	delegated to
`selector1`	RSA 2048	`selector1-cta-ch._domainkey.ctaagschweiz.onmicrosoft.com`

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.

GoogleAtlassianGlobalSign

History

19 October 2026 Score 61 · DMARC none

All changes of this organisation in the change log →

Raw data

cta.ch. IN MX 10 d307724.b.ess.de.barracudanetworks.com.
cta.ch. IN MX 20 d307724.a.ess.de.barracudanetworks.com.
cta.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:spf.ess.de.barracudanetworks.com include:_spf.psm.knowbe4.com a:mail01.refline.ch a:mail02.refline.ch mx include:spf.crsend.com -all"
_dmarc.cta.ch. IN TXT "v=DMARC1; p=none; rua=mailto:dmarc-reporting@cta.ch;"

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