TX Group

tx.group

Industry: Telecom, IT & media
Headquarters: Zürich, Zurich
Type: listed
Employees (approx.): 3,300
Checked on: 19 October 2026

64/100Grade C

Protection against forged senders: largely protected

Points per criterion

MX 10 / 10
SPF 15 / 15
DKIM 20 / 20
DMARC 19 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 63.6 ▲ 0.4
Canton avg.: 53 ▲ 11
Overall avg.: 53.5 ▲ 10.5
Rank 32 of 50 in the industry

Findings

!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: Google Workspace
Provider jurisdiction: USA · MX: US
Detection confidence: 84 / 100
Microsoft tenant: Managed · TX Group
Tenant region: EU

Signals (6)

Domain verification	Microsoft 365	`MS=ms55340657`
MX	Google Workspace	`aspmx.l.google.com`
DKIM	Google Workspace	`google`
Domain verification	Google Workspace	`google-site-verification=hXbcq03aldIKQ4H`
Network	Google Workspace	`AS15169 GOOGLE - Google LLC`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
1	`aspmx.l.google.com`	`142.251.127.26`	AS15169 GOOGLE - Google LLC	US	–
5	`alt1.aspmx.l.google.com`	`142.250.147.27`	AS15169 GOOGLE - Google LLC	US	–
5	`alt2.aspmx.l.google.com`	`172.253.152.26`	AS15169 GOOGLE - Google LLC	US	–
10	`alt3.aspmx.l.google.com`	`192.179.20.27`	AS15169 GOOGLE - Google LLC	US	–
10	`alt4.aspmx.l.google.com`	`192.178.158.27`	AS15169 GOOGLE - Google LLC	US	–

SPF

v=spf1 include:spf.tx.group.eu-i5xs0ljo.e1.dspf.app -all

all: -all
DNS lookups: 2 / 10
Includes: spf.tx.group.eu-i5xs0ljo.e1.dspf.app

DMARC

v=DMARC1; p=quarantine; rua=mailto:i5xs0ljo@rua.eu.dmarcmanager.app; ruf=mailto:i5xs0ljo@ruf.eu.dmarcmanager.app; fo=1

Policy: p=quarantine
Subdomains (sp): inherits p=quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): i5xs0ljo@rua.eu.dmarcmanager.app
Forensic reports (ruf): i5xs0ljo@ruf.eu.dmarcmanager.app

DKIM

Selector	Key	delegated to
`google`	RSA 1024	–
`s1`	RSA 2048	`s1.domainkey.u46969590.wl091.sendgrid.net`
`s2`	RSA 2048	`s2.domainkey.u46969590.wl091.sendgrid.net`

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 365GoogleAppleAtlassianDocuSignZoomMiroNotionCanvaAirtablePostmanTeamViewer

History

18 October 2026 Score 64 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

tx.group. IN MX 1 aspmx.l.google.com.
tx.group. IN MX 5 alt1.aspmx.l.google.com.
tx.group. IN MX 5 alt2.aspmx.l.google.com.
tx.group. IN MX 10 alt3.aspmx.l.google.com.
tx.group. IN MX 10 alt4.aspmx.l.google.com.
tx.group. IN TXT "v=spf1 include:spf.tx.group.eu-i5xs0ljo.e1.dspf.app -all"
_dmarc.tx.group. IN TXT "v=DMARC1; p=quarantine; rua=mailto:i5xs0ljo@rua.eu.dmarcmanager.app; ruf=mailto:i5xs0ljo@ruf.eu.dmarcmanager.app; fo=1"

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