Glas Trösch

glastroesch.ch

Industry: Building materials
Headquarters: Bützberg, Bern
Type: private
Employees (approx.): 6,000
Checked on: 19 October 2026

50/100Grade C

Protection against forged senders: protected

Points per criterion

MX 10 / 10
SPF 15 / 15
DKIM 0 / 20
DMARC 25 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 60.3 ▼ 10.3
Canton avg.: 53.1 ▼ 3.1
Overall avg.: 53.5 ▼ 3.5
Rank 15 of 20 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.
!SPF authorises very large IP ranges (65,859)

The SPF record itself lists IPv4 ranges with more than 65,000 addresses. The wider the range, the easier it is for third parties to send from an authorised network.
!External report receiver not authorised

The authorisation record for an external rua domain is missing (RFC 7489 §7.1); many receivers then send no reports.
!No DKIM key found

No key was found under more than 100 common selectors. A custom selector is possible, but without DKIM there is no cryptographic sender check.
!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.
iStrict DMARC alignment

adkim=s or aspf=s requires exact domain matches. Secure, but demanding when sending from subdomains.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Self-hosted / other
Provider jurisdiction: Switzerland · MX: CH
Detection confidence: 85 / 100
Microsoft tenant: Managed · Glas Trösch Holding AG
Tenant region: EU

Signals (4)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
Network	Swisscom	`AS3303 SWISSCOM - Swisscom (Schweiz) AG`
Network	Swiss hoster	`AS6730 SUNRISE - Sunrise GmbH`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mail.glastroesch.ch`	`195.65.106.15`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
20	`mail2.glastroesch.ch`	`213.193.108.15`	AS6730 SUNRISE - Sunrise GmbH	CH	–

SPF

v=spf1 a mx a:smtp-out.primeteach.ch a:smtp.primeteach.ch a:tajo.host.ch ip4:195.65.106.0/24 ip4:213.193.108.0/26 ip4:140.140.0.0/16 ip4:46.231.200.25 ip4:185.46.57.91 ip4:217.150.241.20 include:_spf.rexx-suite.com include:_spf.senders.scnem.com include:spf.netzone.ch include:spf.protection.outlook.com -all

all: -all
DNS lookups: 9 / 10
Includes: _spf.rexx-suite.com_spf.senders.scnem.comspf.netzone.chspf.protection.outlook.com
Detected sending services: Microsoft 365
IPv4: 65,859 addresses authorised directly

DMARC

v=DMARC1; p=reject; fo=0; pct=100; ri=604800; adkim=s; aspf=s; rua=mailto:72c66e20981343488a522a17cac703ae@dmarc-reports.cloudflare.net,mailto:itsec-test3@euroglas.com;

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: strict / strict
Aggregate reports (rua): 72c66e20981343488a522a17cac703ae@dmarc-reports.cloudflare.netitsec-test3@euroglas.com
Report services: Cloudflare

DKIM

No DKIM key found

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.

Apple

History

18 October 2026 Score 50 · DMARC reject

All changes of this organisation in the change log →

Raw data

glastroesch.ch. IN MX 10 mail.glastroesch.ch.
glastroesch.ch. IN MX 20 mail2.glastroesch.ch.
glastroesch.ch. IN TXT "v=spf1 a mx a:smtp-out.primeteach.ch a:smtp.primeteach.ch a:tajo.host.ch ip4:195.65.106.0/24 ip4:213.193.108.0/26 ip4:140.140.0.0/16 ip4:46.231.200.25 ip4:185.46.57.91 ip4:217.150.241.20 include:_spf.rexx-suite.com include:_spf.senders.scnem.com include:spf.netzone.ch include:spf.protection.outlook.com -all"
_dmarc.glastroesch.ch. IN TXT "v=DMARC1; p=reject; fo=0; pct=100; ri=604800; adkim=s; aspf=s; rua=mailto:72c66e20981343488a522a17cac703ae@dmarc-reports.cloudflare.net,mailto:itsec-test3@euroglas.com;"

More from this industry

← Back to overview