Steiner AG
steiner.ch
- Industry
- Construction & real estate
- Headquarters
- Zürich, Zurich
- Type
- private
- Employees (approx.)
- 300
- Checked on
- 19 October 2026
55/100Grade C
Protection against forged senders: not protected
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 0 / 25
- DNSSEC 10 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 58.2 ▼ 3.2
- Canton avg.: 53 ▲ 2
- Overall avg.: 53.5 ▲ 1.5
- Rank 39 of 67 in the industry
Findings
-
✕No DMARC record
Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.
-
!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.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Provider jurisdiction
- USA · MX: US
- Detection confidence
- 100 / 100
- Microsoft tenant
- Federated · Steiner AG
- Tenant region
- EU
- Federated via
fs.steiner.ch
Signals (6)
| MX | Microsoft 365 | steiner-ch.mail.protection.outlook.com |
|---|---|---|
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
| DKIM | Microsoft 365 | selector1 → selector1-steiner-ch._domainkey.steinerag.onmicrosoft.com |
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Network | Microsoft 365 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Federated) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | steiner-ch.mail.protection.outlook.com | 52.101.181.153 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | – |
52.101.185.114 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | |||
52.101.91.159 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US |
SPF
v=spf1 include:spf.protection.outlook.com -all- all
-all- DNS lookups
- 1 / 10
- Includes
spf.protection.outlook.com- Detected sending services
- Microsoft 365
DMARC
Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.
DKIM
| Selector | Key | delegated to |
|---|---|---|
selector1 | RSA 1024 | selector1-steiner-ch._domainkey.steinerag.onmicrosoft.com |
selector2 | RSA 2048 | selector2-steiner-ch._domainkey.steinerag.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
History
- Score 55 · DMARC -
Raw data
steiner.ch. IN MX 10 steiner-ch.mail.protection.outlook.com.
steiner.ch. IN TXT "v=spf1 include:spf.protection.outlook.com -all"More from this industry
- Meier Tobler 85
- Caliqua 80
- Equans Schweiz 80
- Hälg Group 80
- Hastag 80
- Allreal 74
- Swiss Prime Site 74
- Warteck Invest 74
