Twerenbold Reisen
twerenbold.ch
- Industry
- Tourism & hospitality
- Headquarters
- Baden, Aargau
- Type
- private
- Employees (approx.)
- 500
- Checked on
- 19 October 2026
Protection against forged senders: not protected (monitoring only)
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 6 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 57.3 ▼ 6.3
- Canton avg.: 57.3 ▼ 6.3
- Overall avg.: 53.5 ▼ 2.5
- Rank 27 of 38 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.
-
!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 · Twerenbold Service AG
- Tenant region
- EU
Signals (9)
| MX | Microsoft 365 | twerenbold-ch.mail.protection.outlook.com |
|---|---|---|
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
| DKIM | Microsoft 365 | selector1 → selector1-twerenbold-ch._domainkey.twerenboldservice.onmicrosoft.com |
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Domain verification | Microsoft 365 | MS=ms68584032 |
| Network | Microsoft 365 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation |
| Domain verification | Google Workspace | google-site-verification=dVr93D8FSXq4quc |
| SPF | Amazon | include:amazonses.com |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 0 | twerenbold-ch.mail.protection.outlook.com | 52.101.185.12 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | – |
52.101.185.14 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US | |||
52.101.187.1 | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | US |
SPF
v=spf1 ip4:212.243.143.146 ip4:83.144.244.100 ip4:195.65.218.36 ip4:5.148.188.46 ip4:88.99.64.201 include:spf.protection.outlook.com include:25717324.spf02.hubspotemail.net include:mailgun.org include:_relay.amadeus.com include:_spf.atlassian.net -all- all
-all- DNS lookups
- 10 / 10
- Includes
spf.protection.outlook.com25717324.spf02.hubspotemail.netmailgun.org_relay.amadeus.com_spf.atlassian.net- Detected sending services
- Microsoft 365, HubSpot, Mailgun, Atlassian, Amazon SES
- IPv4
- 5 addresses authorised directly
DMARC
v=DMARC1; p=none; rua=mailto:it@twerenbold.ch;- Policy
- p=none
- Subdomains (sp)
- inherits p=none
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
it@twerenbold.ch
DKIM
| Selector | Key | delegated to |
|---|---|---|
mx | RSA 1024 | – |
selector1 | RSA 1024 | selector1-twerenbold-ch._domainkey.twerenboldservice.onmicrosoft.com |
selector2 | RSA 1024 | selector2-twerenbold-ch._domainkey.twerenboldservice.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 365GoogleApple
History
- Score 51 · DMARC none
Raw data
twerenbold.ch. IN MX 0 twerenbold-ch.mail.protection.outlook.com.
twerenbold.ch. IN TXT "v=spf1 ip4:212.243.143.146 ip4:83.144.244.100 ip4:195.65.218.36 ip4:5.148.188.46 ip4:88.99.64.201 include:spf.protection.outlook.com include:25717324.spf02.hubspotemail.net include:mailgun.org include:_relay.amadeus.com include:_spf.atlassian.net -all"
_dmarc.twerenbold.ch. IN TXT "v=DMARC1; p=none; rua=mailto:it@twerenbold.ch;"