Salt

salt.ch

Industry: Telecom, IT & media
Headquarters: Renens, Vaud
Type: private
Employees (approx.): 1,000
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.: 58.5 ▲ 5.5
Overall avg.: 53.5 ▲ 10.5
Rank 27 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: Self-hosted / other
Upstream gateway: Trend Micro
Provider jurisdiction: unclear · MX: US
Detection confidence: 85 / 100
Microsoft tenant: Managed · salt.ch
Tenant region: EU

Signals (3)

Domain verification	Google Workspace	`google-site-verification=_QfxmMUyDknosKj`
Network	Amazon	`AS16509 AMAZON-02 - Amazon.com, Inc.`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`saltch.in.tmes.trendmicro.eu`	`18.185.115.147`	AS16509 AMAZON-02 - Amazon.com, Inc.	US	–
		`18.185.115.146`	AS16509 AMAZON-02 - Amazon.com, Inc.	US
		`18.185.115.145`	AS16509 AMAZON-02 - Amazon.com, Inc.	US

SPF

v=spf1 ip4:213.55.206.14 ip4:213.55.192.36 ip4:213.55.192.37 ip4:77.109.144.50 ip4:195.78.26.22 ip4:195.78.26.30 ip4:172.246.49.158 a:mailing.eqs.com a:spf1.refline.ch a:spf2.refline.ch include:spf.tmes.trendmicro.eu -all

all: -all
DNS lookups: 4 / 10
Includes: spf.tmes.trendmicro.eu
IPv4: 7 addresses authorised directly

DMARC

v=DMARC1; p=quarantine ;rua=mailto:dmarc@salt.ch; ruf=mailto:dmarc_fail@salt.ch; pct=100; fo=1

Policy: p=quarantine
Subdomains (sp): inherits p=quarantine
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc@salt.ch
Forensic reports (ruf): dmarc_fail@salt.ch

DKIM

Selector	Key	delegated to
`default`	RSA 2048	–
`mail`	RSA 1024	–
`mailjet`	RSA 1024	–

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.

GoogleApple

History

18 October 2026 Score 64 · DMARC quarantine

All changes of this organisation in the change log →

Raw data

salt.ch. IN MX 10 saltch.in.tmes.trendmicro.eu.
salt.ch. IN TXT "v=spf1 ip4:213.55.206.14 ip4:213.55.192.36 ip4:213.55.192.37 ip4:77.109.144.50 ip4:195.78.26.22 ip4:195.78.26.30 ip4:172.246.49.158 a:mailing.eqs.com a:spf1.refline.ch a:spf2.refline.ch include:spf.tmes.trendmicro.eu -all"
_dmarc.salt.ch. IN TXT "v=DMARC1; p=quarantine ;rua=mailto:dmarc@salt.ch; ruf=mailto:dmarc_fail@salt.ch; pct=100; fo=1"

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