Hamilton

hamilton.ch

Industry: Medtech
Headquarters: Bonaduz, Grisons
Type: private
Employees (approx.): 4,000
Checked on: 19 October 2026

80/100Grade B

Protection against forged senders: protected

Points per criterion

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

Industry avg.: 59.8 ▲ 20.2
Canton avg.: 47.2 ▲ 32.8
Overall avg.: 53.5 ▲ 26.5
Rank 1 of 26 in the industry

Findings

!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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Managed · Hamilton Group
Tenant region: EU

Signals (8)

MX	Microsoft 365	`hamilton-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-hamilton-ch._domainkey.hamiltoncomp.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms16220325`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
SPF	Swiss hoster	`include:spf.mail.hostpoint.ch`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
0	`hamilton-ch.mail.protection.outlook.com`	`52.101.73.155`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.91.156`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.68.27`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 redirect=_spf.hamilton.ch

all: -all
DNS lookups: 5 / 10
Includes: _spf.hamilton.chspf.protection.outlook.comspf.emailsignatures365.comspf.mail.hostpoint.chspf.customer.frentix.com
Detected sending services: Microsoft 365, Hostpoint
IPv4: 3 addresses authorised directly

DMARC

v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email;

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc_agg@vali.email

DKIM

Selector	Key	delegated to
`s1`	RSA 2048	`s1.domainkey.u19191749.wl250.sendgrid.net`
`s2`	RSA 1024	`s2.domainkey.u19191749.wl250.sendgrid.net`
`selector1`	RSA 1024	`selector1-hamilton-ch._domainkey.hamiltoncomp.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-hamilton-ch._domainkey.hamiltoncomp.onmicrosoft.com`

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 365MiroZapierTeamViewer

History

18 October 2026 Score 80 · DMARC reject

All changes of this organisation in the change log →

Raw data

hamilton.ch. IN MX 0 hamilton-ch.mail.protection.outlook.com.
hamilton.ch. IN TXT "v=spf1 redirect=_spf.hamilton.ch"
_dmarc.hamilton.ch. IN TXT "v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email;"

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