NZZ

nzz.ch

Industry: Telecom, IT & media
Headquarters: Zürich, Zurich
Type: private
Employees (approx.): 1,300
Checked on: 19 October 2026

75/100Grade B

Protection against forged senders: protected

Points per criterion

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

Industry avg.: 63.6 ▲ 11.4
Canton avg.: 53 ▲ 22
Overall avg.: 53.5 ▲ 21.5
Rank 9 of 50 in the industry

Findings

!SPF close to the 10-lookup limit (10)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Google Workspace
Provider jurisdiction: USA · MX: US
Detection confidence: 96 / 100
Microsoft tenant: Managed · NZZ
Tenant region: EU

Signals (10)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-nzz-ch._domainkey.nzzmg.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
MX	Google Workspace	`smtp.google.com`
SPF	Google Workspace	`include:_spf.google.com`
DKIM	Google Workspace	`google`
Domain verification	Google Workspace	`google-site-verification=32KPy4TVl3lo_EH`
Network	Google Workspace	`AS15169 GOOGLE - Google LLC`
SPF	Amazon	`include:amazonses.com`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
1	`smtp.google.com`	`142.251.127.27`	AS15169 GOOGLE - Google LLC	US	–
1	`smtp.google.com`	`142.251.127.26`	AS15169 GOOGLE - Google LLC	US	–

SPF

v=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.cmail.ondemand.com include:_spf.google.com include:_spf-dc74.sapsf.eu include:_spf1.nzz.ch exists:%{i}._spf.mta.salesforce.com include:_spf.prospective.ch include:mxsspf.sendpulse.com -all

all: -all
DNS lookups: 10 / 10
Includes: spf.protection.outlook.comamazonses.com_spf.cmail.ondemand.com_spf.google.com_spf-dc74.sapsf.eu_spf1.nzz.ch_spf.prospective.chmxsspf.sendpulse.com
Detected sending services: Microsoft 365, Amazon SES, Google

DMARC

v=DMARC1; p=reject; sp=quarantine; rua=mailto:dmarc-reports@nzz.ch; ruf=mailto:dmarc-forensics@nzz.ch; pct=100; fo=1

Policy: p=reject
Subdomains (sp): quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc-reports@nzz.ch
Forensic reports (ruf): dmarc-forensics@nzz.ch

DKIM

Selector	Key	delegated to
`google`	RSA 1024	–
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`mail`	RSA 1024	–
`mandrill`	RSA 1024	–
`s1`	RSA 2048	`s1.domainkey.u17020272.wl023.sendgrid.net`
`s2`	RSA 1024	`s2.domainkey.u17020272.wl023.sendgrid.net`
`s3`	RSA 2048	`s3.domainkey.u54815296.wl047.sendgrid.net`
`selector1`	RSA 2048	`selector1-nzz-ch._domainkey.nzzmg.onmicrosoft.com`
`selector2`	RSA 2048	`selector2-nzz-ch._domainkey.nzzmg.onmicrosoft.com`

Checked: 100 common selectors. Keys under custom selectors remain invisible.

Transport encryption

MTA-STS: missing
DANE: missing
DNSSEC: missing
TLS-RPT: mailto:tls-rpt@nzz.ch
BIMI: missing

Verified services

From verification records in the domain TXT: services where the domain is verified.

GoogleAppleMeta/FacebookAtlassianAdobeGlobalSignMiroBrevoAirtable

History

18 October 2026 Score 75 · DMARC reject

All changes of this organisation in the change log →

Raw data

nzz.ch. IN MX 1 smtp.google.com.
nzz.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.cmail.ondemand.com include:_spf.google.com include:_spf-dc74.sapsf.eu include:_spf1.nzz.ch exists:%{i}._spf.mta.salesforce.com include:_spf.prospective.ch include:mxsspf.sendpulse.com -all"
_dmarc.nzz.ch. IN TXT "v=DMARC1; p=reject; sp=quarantine; rua=mailto:dmarc-reports@nzz.ch; ruf=mailto:dmarc-forensics@nzz.ch; pct=100; fo=1"
_smtp._tls.nzz.ch. IN TXT "v=TLSRPTv1; rua=mailto:tls-rpt@nzz.ch"

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