Stadt Thun
thun.ch
- Industry
- Municipalities
- Headquarters
- Thun, Bern
- Type
- public
- Population
- 44,163
- FSO no.
- 942
- Checked on
- 19 October 2026
80/100Grade B
Protection against forged senders: protected, with a gap: subdomains not protected (sp=none)
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 25 / 25
- DNSSEC 10 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 50.9 ▲ 29.1
- Canton avg.: 53.1 ▲ 26.9
- Overall avg.: 53.5 ▲ 26.5
- Rank 178 of 2077 in the industry
Findings
-
!SPF close to the 10-lookup limit (9)
One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
-
!Subdomains unprotected (sp=none)
The main domain is protected, but subdomains such as invoice.company.ch can still be forged.
-
!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: CH
- Detection confidence
- 97 / 100
- Microsoft tenant
- Managed · Stadt Thun (GOV)
- Tenant region
- EU
Signals (3)
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
|---|---|---|
| DKIM | Microsoft 365 | selector1 → selector1-thun-ch._domainkey.stadtthun.onmicrosoft.com |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | mx1.thun.ch | 82.220.26.134 | AS9044 SOLNET - BSE Software GmbH | CH | – |
| 10 | mx2.thun.ch | 82.220.26.135 | AS9044 SOLNET - BSE Software GmbH | CH | – |
SPF
v=spf1 ip4:82.220.26.128/26 include:spf.internetgalerie.ch mx include:spf.cloudrexx.com include:_spf.i-web.ch include:_spf.sui-inter.net include:spf.protection.outlook.com a:c.spf.service-now.com a:mail.codx.ch include:spf.mandrillapp.com -all- all
-all- DNS lookups
- 9 / 10
- Includes
spf.internetgalerie.chspf.cloudrexx.com_spf.i-web.ch_spf.sui-inter.netspf.protection.outlook.comspf.mandrillapp.com- Detected sending services
- Microsoft 365, Mailchimp/Mandrill, Mailchimp Transactional
- IPv4
- 64 addresses authorised directly
DMARC
v=DMARC1; p=reject; sp=none; rua=mailto:fakemail@thun.ch; ruf=mailto:fakemail@thun.ch; adkim=r; aspf=r; fo=1; pct=100- Policy
- p=reject
- Subdomains (sp)
- none
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
fakemail@thun.ch- Forensic reports (ruf)
fakemail@thun.ch
DKIM
| Selector | Key | delegated to |
|---|---|---|
k2 | RSA 2048 | dkim2.mcsv.net |
k3 | RSA 2048 | dkim3.mcsv.net |
s2 | RSA 2048 | – |
selector1 | RSA 1024 | selector1-thun-ch._domainkey.stadtthun.onmicrosoft.com |
selector2 | RSA 1024 | selector2-thun-ch._domainkey.stadtthun.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
Verified services
From verification records in the domain TXT: services where the domain is verified.
Miro
History
- Score 80 · DMARC reject
Raw data
thun.ch. IN MX 10 mx1.thun.ch.
thun.ch. IN MX 10 mx2.thun.ch.
thun.ch. IN TXT "v=spf1 ip4:82.220.26.128/26 include:spf.internetgalerie.ch mx include:spf.cloudrexx.com include:_spf.i-web.ch include:_spf.sui-inter.net include:spf.protection.outlook.com a:c.spf.service-now.com a:mail.codx.ch include:spf.mandrillapp.com -all"
_dmarc.thun.ch. IN TXT "v=DMARC1; p=reject; sp=none; rua=mailto:fakemail@thun.ch; ruf=mailto:fakemail@thun.ch; adkim=r; aspf=r; fo=1; pct=100"