SLKK
slkk.ch
- Industry
- Health insurers
- Headquarters
- Zürich, Zurich
- Type
- private
- Employees (approx.)
- 50
- Checked on
- 19 October 2026
70/100Grade B
Protection against forged senders: protected
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 25 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 60.5 ▲ 9.5
- Canton avg.: 53 ▲ 17
- Overall avg.: 53.5 ▲ 16.5
- Rank 6 of 16 in the industry
Findings
-
!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.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Provider jurisdiction
- USA · MX: US
- Detection confidence
- 100 / 100
- Microsoft tenant
- Managed · SLKK
- Tenant region
- EU
Signals (8)
| MX | Microsoft 365 | slkk-ch.mail.protection.outlook.com |
|---|---|---|
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
| DKIM | Microsoft 365 | selector1 → selector1-slkk-ch._domainkey.slkk290.onmicrosoft.com |
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Domain verification | Microsoft 365 | MS=ms79519787 |
| Network | Microsoft 365 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation |
| Domain verification | Google Workspace | google-site-verification=nocJU_mRRI2mCJw |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 0 | slkk-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 mx a ip4:212.51.143.230 include:_spf.ewmail.com include:spf.protection.outlook.com -all- all
-all- DNS lookups
- 5 / 10
- Includes
_spf.ewmail.comspf.protection.outlook.com- Detected sending services
- Microsoft 365
- IPv4
- 1 addresses authorised directly
DMARC
v=DMARC1;p=reject;pct=100;rua=mailto:983aab7b39@rua.easydmarc.eu;ruf=mailto:983aab7b39@ruf.easydmarc.eu;ri=86400;fo=1;- Policy
- p=reject
- Subdomains (sp)
- inherits p=reject
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
983aab7b39@rua.easydmarc.eu- Forensic reports (ruf)
983aab7b39@ruf.easydmarc.eu- Report services
- EasyDMARC
DKIM
| Selector | Key | delegated to |
|---|---|---|
selector1 | RSA 2048 | selector1-slkk-ch._domainkey.slkk290.onmicrosoft.com |
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 365Google
History
- Score 70 · DMARC reject
Raw data
slkk.ch. IN MX 0 slkk-ch.mail.protection.outlook.com.
slkk.ch. IN TXT "v=spf1 mx a ip4:212.51.143.230 include:_spf.ewmail.com include:spf.protection.outlook.com -all"
_dmarc.slkk.ch. IN TXT "v=DMARC1;p=reject;pct=100;rua=mailto:983aab7b39@rua.easydmarc.eu;ruf=mailto:983aab7b39@ruf.easydmarc.eu;ri=86400;fo=1;"