Halter AG

halter.ch

Industry: Construction & real estate
Headquarters: Schlieren, Zurich
Type: private
Employees (approx.): 600
Checked on: 19 October 2026

51/100Grade C

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.: 58.2 ▼ 7.2
Canton avg.: 53 ▼ 2
Overall avg.: 53.5 ▼ 2.5
Rank 44 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.
!DMARC without reporting (no rua)

Without aggregate reports it stays invisible who sends in the domain's name.
!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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Upstream gateway: Cisco Secure Email
Provider jurisdiction: USA · MX: US
Detection confidence: 92 / 100
Microsoft tenant: Managed · Halter AG
Tenant region: EU

Signals (5)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms74203281`
Domain verification	Google Workspace	`google-site-verification=oc7psgazdAaBqvV`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mx2.hc1250-59.eu.iphmx.com`	`23.90.122.17`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–
10	`mx2.hc1250-59.eu.iphmx.com`	`23.90.110.218`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–
10	`mx1.hc1250-59.eu.iphmx.com`	`23.90.122.17`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–
10	`mx1.hc1250-59.eu.iphmx.com`	`23.90.110.218`	AS30238 AS-IRONP-VEGA - Cisco Systems Ironport Division	US	–

SPF

v=spf1 mx include:spf.protection.outlook.com include:_spf.prospective.ch exists:%{i}.spf.hc1250-59.eu.iphmx.com include:spf.protection.cyon.net include:_spf.zimpel.de -all

all: -all
DNS lookups: 6 / 10
Includes: spf.protection.outlook.com_spf.prospective.chspf.protection.cyon.net_spf.zimpel.de
Detected sending services: Microsoft 365

DMARC

v=DMARC1; p=none;

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): –

DKIM

Selector	Key	delegated to
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`mailjet`	RSA 1024	–
`selector1`	RSA 2048	–

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 365GoogleAppleAdobeBrevoNotionAutodesk

History

18 October 2026 Score 51 · DMARC none

All changes of this organisation in the change log →

Raw data

halter.ch. IN MX 10 mx2.hc1250-59.eu.iphmx.com.
halter.ch. IN MX 10 mx1.hc1250-59.eu.iphmx.com.
halter.ch. IN TXT "v=spf1 mx include:spf.protection.outlook.com include:_spf.prospective.ch exists:%{i}.spf.hc1250-59.eu.iphmx.com include:spf.protection.cyon.net include:_spf.zimpel.de -all"
_dmarc.halter.ch. IN TXT "v=DMARC1; p=none;"

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