ewl Energie Wasser Luzern

ewl-luzern.ch

Industry: Energy
Headquarters: Luzern, Lucerne
Type: public
Employees (approx.): 400
Checked on: 19 October 2026

61/100Grade C

Protection against forged senders: not protected (monitoring only)

Points per criterion

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

Industry avg.: 60.5 ▲ 0.5
Canton avg.: 56.6 ▲ 4.4
Overall avg.: 53.5 ▲ 7.5
Rank 25 of 43 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.
!SPF close to the 10-lookup limit (8)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!DMARC without reporting (no rua)

Without aggregate reports it stays invisible who sends in the domain's name.
!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
Provider jurisdiction: USA · MX: CH
Detection confidence: 99 / 100
Microsoft tenant: Managed · ewl energie wasser luzern
Tenant region: EU

Signals (5)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-ewlluzern-ch0i._domainkey.ewlluzern.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Google Workspace	`google-site-verification=u174gNKXtW7AGSZ`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`gateway.spamcleaner.ch`	`46.22.20.61`	AS51873 AS-ARCADE - Arcade Solutions AG	CH	–
10	`gateway.spamcleaner.ch`	`46.22.20.62`	AS51873 AS-ARCADE - Arcade Solutions AG	CH	–
40	`gateway2.spamcleaner.ch`	`46.22.20.62`	AS51873 AS-ARCADE - Arcade Solutions AG	CH	–
40	`gateway1.spamcleaner.ch`	`46.22.20.61`	AS51873 AS-ARCADE - Arcade Solutions AG	CH	–

SPF

v=spf1 ip4:46.22.20.41 ip4:46.22.20.61 ip4:46.22.20.62 ip4:46.22.20.132 ip4:13.69.178.176 include:spfa.arcade.ch include:spf.protection.outlook.com include:spf.abacuscity.ch include:spf.umantis.com include:turbo-smtp.com -all

all: -all
DNS lookups: 8 / 10
Includes: spfa.arcade.chspf.protection.outlook.comspf.abacuscity.chspf.umantis.comturbo-smtp.com
Detected sending services: Microsoft 365
IPv4: 5 addresses authorised directly

DMARC

v=DMARC1; p=none;

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): –

DKIM

Selector	Key	delegated to
`default`	RSA 4096	–
`s1`	RSA 2048	`s1.domainkey.u13280126.wl127.sendgrid.net`
`s2`	RSA 2048	`s2.domainkey.u13280126.wl127.sendgrid.net`
`selector1`	RSA 1024	`selector1-ewlluzern-ch0i._domainkey.ewlluzern.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-ewlluzern-ch0i._domainkey.ewlluzern.onmicrosoft.com`
`turbo-smtp`	RSA 1024	–

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.

GoogleAppleMeta/FacebookAtlassian

History

18 October 2026 Score 61 · DMARC none

All changes of this organisation in the change log →

Raw data

ewl-luzern.ch. IN MX 10 gateway.spamcleaner.ch.
ewl-luzern.ch. IN MX 40 gateway2.spamcleaner.ch.
ewl-luzern.ch. IN MX 40 gateway1.spamcleaner.ch.
ewl-luzern.ch. IN TXT "v=spf1 ip4:46.22.20.41 ip4:46.22.20.61 ip4:46.22.20.62 ip4:46.22.20.132 ip4:13.69.178.176 include:spfa.arcade.ch include:spf.protection.outlook.com include:spf.abacuscity.ch include:spf.umantis.com include:turbo-smtp.com -all"
_dmarc.ewl-luzern.ch. IN TXT "v=DMARC1; p=none;"

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