Gemeinde Holderbank
holderbank.ch
- Industry
- Municipalities
- Headquarters
- Holderbank, Aargau
- Type
- public
- Population
- 1,610
- FSO no.
- 4199
- Checked on
- 19 October 2026
Protection against forged senders: not protected
Points per criterion
- MX 10 / 10
- SPF 0 / 15
- DKIM 20 / 20
- DMARC 0 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 50.9 ▼ 20.9
- Canton avg.: 57.3 ▼ 27.3
- Overall avg.: 53.5 ▼ 23.5
- Rank 1685 of 2077 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.
-
!SPF contains void includes (1)
At least one include points to a domain without SPF. Usually a leftover of a retired service; it can cause a permerror.
-
!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
- Self-hosted / other
- Provider jurisdiction
- Switzerland · MX: CH
- Detection confidence
- 85 / 100
- Microsoft tenant
- Managed · holderbank.ch
- Tenant region
- EU
Signals (1)
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
|---|
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | mail1.obtcloud.ch | 185.156.8.32 | AS215044 OBT-AG - OBT AG | CH | – |
SPF
v=spf1 mx include:_spf.holderbank.ch include:_spf.rzobt.ch -all- all
-all- DNS lookups
- 3 / 10
- Includes
_spf.holderbank.ch_spf.rzobt.ch
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 |
|---|---|---|
dkim1 | RSA 2048 | – |
Checked: 100 common selectors. Keys under custom selectors remain invisible.
Transport encryption
- MTA-STS
- missing
- DANE
- missing
- DNSSEC
- missing
- TLS-RPT
- missing
- BIMI
- missing
History
- Score 30 · DMARC -
Raw data
holderbank.ch. IN MX 10 mail1.obtcloud.ch.
holderbank.ch. IN TXT "v=spf1 mx include:_spf.holderbank.ch include:_spf.rzobt.ch -all"