IWB

iwb.ch

Industry: Energy
Headquarters: Basel, Basel-City
Type: public
Employees (approx.): 900
Checked on: 19 October 2026

51/100Grade 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 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 60.5 ▼ 9.5
Canton avg.: 57.4 ▼ 6.4
Overall avg.: 53.5 ▼ 2.5
Rank 31 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.
!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: Microsoft 365
Provider jurisdiction: USA · MX: CH
Detection confidence: 99 / 100
Microsoft tenant: Managed · IWB
Tenant region: EU

Signals (6)

SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-iwb-ch._domainkey.iwbch.onmicrosoft.com`
Domain verification	Microsoft 365	`ms=ms90894868`
SPF	Amazon	`include:amazonses.com`
Domain verification	Amazon	`amazonses:/pp8NEGneyu6nUuM0rL67+Xmr7NnQ7`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`mx01.iwb.ch`	`194.56.219.34`	AS43284 IWB-TELEKOM - IWB Industrielle Werke Basel	CH	–

SPF

v=spf1 ip4:194.56.219.32/28 ip4:212.243.171.144/32 ip4:212.243.171.203/32 ip4:91.212.196.32 ip4:95.130.250.122 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:138.188.166.160/27 include:spf.iwb.ch -all

all: -all
DNS lookups: 8 / 10
Includes: spf.iwb.ch
Detected sending services: Amazon SES, SAP, Mailjet, Salesforce, Microsoft 365
IPv4: 118 addresses authorised directly

DMARC

v=DMARC1;p=none;rua=mailto:dmarc@iwb.ch;ruf=mailto:dmarc@iwb.ch

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): dmarc@iwb.ch
Forensic reports (ruf): dmarc@iwb.ch

DKIM

Selector	Key	delegated to
`mail`	RSA 1024	–
`mailjet`	RSA 1024	–
`selector1`	RSA 1024	`selector1-iwb-ch._domainkey.iwbch.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-iwb-ch._domainkey.iwbch.onmicrosoft.com`

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 365AppleAtlassianAmazon SESGlobalSignTeamViewer

History

18 October 2026 Score 51 · DMARC none

All changes of this organisation in the change log →

Raw data

iwb.ch. IN MX 10 mx01.iwb.ch.
iwb.ch. IN TXT "v=spf1 ip4:194.56.219.32/28 ip4:212.243.171.144/32 ip4:212.243.171.203/32 ip4:91.212.196.32 ip4:95.130.250.122 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:138.188.166.160/27 include:spf.iwb.ch -all"
_dmarc.iwb.ch. IN TXT "v=DMARC1;p=none;rua=mailto:dmarc@iwb.ch;ruf=mailto:dmarc@iwb.ch"

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