Prager Dreifuss

prager-dreifuss.com

Industry: Consulting & audit
Headquarters: Zürich, Zurich
Type: private
Employees (approx.): 100
Checked on: 19 October 2026

31/100Grade D

Protection against forged senders: not protected (monitoring only)

Points per criterion

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

Industry avg.: 66.8 ▼ 35.8
Canton avg.: 53 ▼ 22
Overall avg.: 53.5 ▼ 22.5
Rank 43 of 45 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.
!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.

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 · prager-dreifuss.com
Tenant region: EU

Signals (2)

Network	Swisscom	`AS3303 SWISSCOM - Swisscom (Schweiz) AG`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mx1.prager-dreifuss.com`	`217.193.169.221`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–
20	`mx2.prager-dreifuss.com`	`212.243.229.138`	AS3303 SWISSCOM - Swisscom (Schweiz) AG	CH	–

SPF

v=spf1 a mx ip4:217.193.169.221 ip4:212.243.229.138 -all

all: -all
DNS lookups: 2 / 10
IPv4: 2 addresses authorised directly

DMARC

v=DMARC1;p=none;pct=100;rua=mailto:pddmarc@prager-dreifuss.com;ruf=mailto:pddmarc@prager-dreifuss.com

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): pddmarc@prager-dreifuss.com
Forensic reports (ruf): pddmarc@prager-dreifuss.com

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

History

19 October 2026 Score 31 · DMARC none

All changes of this organisation in the change log →

Raw data

prager-dreifuss.com. IN MX 10 mx1.prager-dreifuss.com.
prager-dreifuss.com. IN MX 20 mx2.prager-dreifuss.com.
prager-dreifuss.com. IN TXT "v=spf1 a mx ip4:217.193.169.221 ip4:212.243.229.138 -all"
_dmarc.prager-dreifuss.com. IN TXT "v=DMARC1;p=none;pct=100;rua=mailto:pddmarc@prager-dreifuss.com;ruf=mailto:pddmarc@prager-dreifuss.com"

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