Siegfried

siegfried.ch

Industry: Pharma & biotech
Headquarters: Zofingen, Aargau
Type: listed
Employees (approx.): 3,700
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.: 65.5 ▲ 14.5
Canton avg.: 57.3 ▲ 22.7
Overall avg.: 53.5 ▲ 26.5
Rank 4 of 24 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
Upstream gateway: Proofpoint
Provider jurisdiction: USA · MX: US
Detection confidence: 90 / 100
Microsoft tenant: Managed · Siegfried AG
Tenant region: EU

Signals (3)

DKIM	Microsoft 365	`selector1 → selector1-siegfried-ch._domainkey.sfzn.onmicrosoft.com`
Domain verification	Microsoft 365	`MS=ms22497261`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
1	`mxa-00823301.gslb.pphosted.com`	`143.55.146.186`	AS52129 PROOFPOINT-ASN-EU - Proofpoint, Inc.	US	–
10	`mxb-00823301.gslb.pphosted.com`	`143.55.149.92`	AS52129 PROOFPOINT-ASN-EU - Proofpoint, Inc.	US	–

SPF

v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all

all: -all
DNS lookups: 1 / 10

DMARC

v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc_rua@emaildefense.proofpoint.com
Forensic reports (ruf): dmarc_ruf@emaildefense.proofpoint.com
Report services: Proofpoint EFD

DKIM

Selector	Key	delegated to
`mandrill`	RSA 1024	–
`selector1`	RSA 2048	`selector1-siegfried-ch._domainkey.sfzn.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 365AtlassianKnowBe4

History

18 October 2026 Score 80 · DMARC reject

All changes of this organisation in the change log →

Raw data

siegfried.ch. IN MX 1 mxa-00823301.gslb.pphosted.com.
siegfried.ch. IN MX 10 mxb-00823301.gslb.pphosted.com.
siegfried.ch. IN TXT "v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all"
_dmarc.siegfried.ch. IN TXT "v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;"

More from this industry

← Back to overview