Denner
denner.ch
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.: 60.1 ▲ 3.9
- Canton avg.: 53 ▲ 11
- Overall avg.: 53.5 ▲ 10.5
- Rank 23 of 58 in the industry
Findings
-
!SPF close to the 10-lookup limit (10)
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.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Provider jurisdiction
- USA · MX: US
- Detection confidence
- 100 / 100
- Microsoft tenant
- Managed · Migros
- Tenant region
- EU
Signals (9)
| MX | Microsoft 365 | denner-ch.mail.protection.outlook.com |
|---|---|---|
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
| DKIM | Microsoft 365 | selector1 → selector1-denner-ch._domainkey.migros.onmicrosoft.com |
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Domain verification | Microsoft 365 | MS=ms57042518 |
| Network | Microsoft 365 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation |
| Domain verification | Google Workspace | google-site-verification=BPsM-zMhbtlOKPT |
| SPF | Amazon | include:amazonses.com |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | denner-ch.mail.protection.outlook.com | 52.101.209.153 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | – |
52.101.181.156 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | |||
52.101.68.12 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US |
SPF
v=spf1 ip4:164.14.6.0/24 ip4:164.14.4.0/24 ip4:35.214.212.238/32 include:spf.protection.outlook.com include:spf.umantis.com include:spf.migros.ch a:c.spf.service-now.com include:amazonses.com include:spf.cs2.ch a:b.spf.service-now.com a:d.spf.service-now.com include:_spf-dc2.successfactors.com -all- all
-all- DNS lookups
- 10 / 10
- Includes
spf.protection.outlook.comspf.umantis.comspf.migros.chamazonses.comspf.cs2.ch_spf-dc2.successfactors.com- Detected sending services
- Microsoft 365, Amazon SES, SAP
- IPv4
- 513 addresses authorised directly
DMARC
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:it-infrastruktur@denner.ch; ruf=mailto:it-infrastruktur@denner.ch; pct=100; ri=86400- Policy
- p=quarantine
- Subdomains (sp)
- quarantine
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
it-infrastruktur@denner.ch- Forensic reports (ruf)
it-infrastruktur@denner.ch
DKIM
| Selector | Key | delegated to |
|---|---|---|
mandrill | RSA 1024 | – |
s1 | RSA 2048 | s1.domainkey.u24633340.wl091.sendgrid.net |
s2 | RSA 2048 | s2.domainkey.u24633340.wl091.sendgrid.net |
sel1 | RSA 2048 | sel1._domainkey.migros.ch |
sel2 | RSA 2048 | sel2._domainkey.migros.ch |
selector1 | RSA 2048 | selector1-denner-ch._domainkey.migros.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 365GoogleAppleAtlassianDocuSignAdobeOneTrust
History
- Score 64 · DMARC quarantine
Raw data
denner.ch. IN MX 10 denner-ch.mail.protection.outlook.com.
denner.ch. IN TXT "v=spf1 ip4:164.14.6.0/24 ip4:164.14.4.0/24 ip4:35.214.212.238/32 include:spf.protection.outlook.com include:spf.umantis.com include:spf.migros.ch a:c.spf.service-now.com include:amazonses.com include:spf.cs2.ch a:b.spf.service-now.com a:d.spf.service-now.com include:_spf-dc2.successfactors.com -all"
_dmarc.denner.ch. IN TXT "v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:it-infrastruktur@denner.ch; ruf=mailto:it-infrastruktur@denner.ch; pct=100; ri=86400"