Stadt Brugg
brugg.ch
- Industry
- Municipalities
- Headquarters
- Brugg, Aargau
- Type
- public
- Population
- 13,615
- FSO no.
- 4095
- Checked on
- 19 October 2026
73/100Grade B
Protection against forged senders: not protected (monitoring only)
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 6 / 25
- DNSSEC 10 / 10
- Transport (MTA-STS/DANE) 12 / 15
- TLS-RPT 0 / 5
- Industry avg.: 50.9 ▲ 22.1
- Canton avg.: 57.3 ▲ 15.7
- Overall avg.: 53.5 ▲ 19.5
- Rank 284 of 2077 in the industry
Findings
-
✕DMARC in monitoring mode only (p=none)
p=none provides reports but does not reject a single forgery. The goal is p=reject.
-
!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.
-
iDANE active (TLSA with DNSSEC)
All MX hosts publish TLSA records secured by DNSSEC.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Upstream gateway
- SEPPmail
- Provider jurisdiction
- USA · MX: CH
- Detection confidence
- 97 / 100
- Microsoft tenant
- Managed · Stadt Brugg
- Tenant region
- EU
Signals (3)
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
|---|---|---|
| DKIM | Microsoft 365 | selector1 → selector1-brugg-ch._domainkey.bruggch.onmicrosoft.com |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | brugg-ch.gate.seppmail.cloud | 86.119.35.35 | AS559 Switch - SWITCH | CH | ✓ DNSSEC |
217.20.196.81 | AS24951 EVERYWARE-NET - EveryWare AG | CH |
SPF
v=spf1 mx include:_spf.ch.seppmail.cloud include:spf.protection.outlook.com -all- all
-all- DNS lookups
- 3 / 10
- Includes
_spf.ch.seppmail.cloudspf.protection.outlook.com- Detected sending services
- SEPPmail, Microsoft 365
DMARC
v=DMARC1;p=none;rua=mailto:postmaster@brugg.ch;ruf=mailto:postmaster@brugg.ch;fo=1- Policy
- p=none
- Subdomains (sp)
- inherits p=none
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
postmaster@brugg.ch- Forensic reports (ruf)
postmaster@brugg.ch
DKIM
| Selector | Key | delegated to |
|---|---|---|
default | RSA 2048 | – |
selector1 | RSA 1024 | selector1-brugg-ch._domainkey.bruggch.onmicrosoft.com |
Checked: 100 common selectors. Keys under custom selectors remain invisible.
Transport encryption
- MTA-STS
- missing
- DANE
- active
- DNSSEC
- active
- TLS-RPT
- missing
- BIMI
- missing
Verified services
From verification records in the domain TXT: services where the domain is verified.
Apple
History
- Score 73 · DMARC none
Raw data
brugg.ch. IN MX 10 brugg-ch.gate.seppmail.cloud.
brugg.ch. IN TXT "v=spf1 mx include:_spf.ch.seppmail.cloud include:spf.protection.outlook.com -all"
_dmarc.brugg.ch. IN TXT "v=DMARC1;p=none;rua=mailto:postmaster@brugg.ch;ruf=mailto:postmaster@brugg.ch;fo=1"