Bouygues E&S InTec Schweiz

bouygues-es.ch

Industry: Construction & real estate
Headquarters: Zürich, Zurich
Type: private
Employees (approx.): 5,000
Checked on: 19 October 2026

39/100Grade D

Protection against forged senders: not protected (monitoring only)

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 0 / 20
DMARC 6 / 25
DNSSEC 10 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 58.2 ▼ 19.2
Canton avg.: 53 ▼ 14
Overall avg.: 53.5 ▼ 14.5
Rank 62 of 67 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.
!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.
!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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Self-hosted / other
Provider jurisdiction: USA · MX: US
Detection confidence: 85 / 100
Microsoft tenant: Managed · BYCN
Tenant region: EU

Signals (3)

Domain verification	Microsoft 365	`MS=ms78099876`
Domain verification	Google Workspace	`google-site-verification=DWFrvVGjodqAkZR`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`concentrateur.bouygues-construction.com`	`216.71.139.133`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–
		`216.71.159.243`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US
		`216.71.159.211`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US
20	`secours.bouygues-construction.com`	`68.232.139.39`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–
		`68.232.139.101`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US
		`68.232.139.177`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US

SPF

v=spf1 a:concentrateur.bouygues-construction.com ~all

all: ~all
DNS lookups: 1 / 10

DMARC

v=DMARC1; p=none; rua=mailto:dmarc_reports@bouygues-construction.com; ruf=mailto:dmarc_reports@bouygues-construction.com; sp=none;

Policy: p=none
Subdomains (sp): none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc_reports@bouygues-construction.com
Forensic reports (ruf): dmarc_reports@bouygues-construction.com

DKIM

No DKIM key found

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.

Microsoft 365Google

History

18 October 2026 Score 39 · DMARC none

All changes of this organisation in the change log →

Raw data

bouygues-es.ch. IN MX 10 concentrateur.bouygues-construction.com.
bouygues-es.ch. IN MX 20 secours.bouygues-construction.com.
bouygues-es.ch. IN TXT "v=spf1 a:concentrateur.bouygues-construction.com ~all"
_dmarc.bouygues-es.ch. IN TXT "v=DMARC1; p=none; rua=mailto:dmarc_reports@bouygues-construction.com; ruf=mailto:dmarc_reports@bouygues-construction.com; sp=none;"

More from this industry

← Back to overview