CKW

ckw.ch

Industry: Energy
Headquarters: Rothenburg, Lucerne
Type: private
Employees (approx.): 2,200
Checked on: 19 October 2026

64/100Grade C

Protection against forged senders: largely protected

Points per criterion

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

Industry avg.: 60.5 ▲ 3.5
Canton avg.: 56.6 ▲ 7.4
Overall avg.: 53.5 ▲ 10.5
Rank 14 of 43 in the industry

Findings

!SPF close to the 10-lookup limit (8)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!DKIM key below 2048 bits

RSA-1024 is considered too weak (RFC 8301, M3AAWG). Rotate to 2048-bit keys.
!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.
iBIMI logo published

A brand logo for mail clients is published (without a certificate large providers do not show it).

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Managed · Axpo Services AG
Tenant region: EU

Signals (7)

MX	Microsoft 365	`ckw-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-ckw-ch._domainkey.axpogrp.y-v1.dkim.mail.microsoft`
Domain verification	Microsoft 365	`MS=ms78257534`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=AlhXExUZnynzJUA`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
5	`ckw-ch.mail.protection.outlook.com`	`52.101.185.14`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.185.12`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.187.1`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 include:spf.protection.outlook.com include:spf1.ckw.ch include:spf.umantis.com include:spf.mailjet.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:marketing.dynamics.com -all

all: -all
DNS lookups: 8 / 10
Includes: spf.protection.outlook.comspf1.ckw.chspf.umantis.comspf.mailjet.commarketing.dynamics.com
Detected sending services: Microsoft 365, Mailjet, Microsoft Dynamics

DMARC

v=DMARC1; p=quarantine; sp=quarantine; fo=1; rua=mailto:aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net; ruf=mailto:aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net;

Policy: p=quarantine
Subdomains (sp): quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net
Forensic reports (ruf): aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net
Report services: Cloudflare

DKIM

Selector	Key	delegated to
`mailjet`	RSA 1024	–
`s1`	RSA 2048	`s1.domainkey.u18785011.wl012.sendgrid.net`
`s2`	RSA 1024	`s2.domainkey.u18785011.wl012.sendgrid.net`
`selector1`	RSA 2048	`selector1-ckw-ch._domainkey.axpogrp.y-v1.dkim.mail.microsoft`
`selector2`	RSA 2048	`selector2-ckw-ch._domainkey.axpogrp.y-v1.dkim.mail.microsoft`

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

Transport encryption

MTA-STS: missing
DANE: missing
DNSSEC: missing
TLS-RPT: missing
BIMI: without certificate · Logo

Verified services

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

Microsoft 365GoogleAppleAtlassianKnowBe4AutodeskPostman

History

18 October 2026 Score 64 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

ckw.ch. IN MX 5 ckw-ch.mail.protection.outlook.com.
ckw.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:spf1.ckw.ch include:spf.umantis.com include:spf.mailjet.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:marketing.dynamics.com -all"
_dmarc.ckw.ch. IN TXT "v=DMARC1; p=quarantine; sp=quarantine; fo=1; rua=mailto:aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net; ruf=mailto:aeb7b5c099da4c19aaf466288b53e73a@dmarc-reports.cloudflare.net;"
default._bimi.ckw.ch. IN TXT "v=BIMI1; l=https://errormessageckw.azurewebsites.net/assets/CKW_Logo_tiny_ps.svg"

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