Rafael Pfister
+41 58 510 22 08 Consulting

Walo Bertschinger

walo.ch

Industry
Construction & real estate
Headquarters
Dietikon, Zurich
Type
private
Employees (approx.)
3,500
Checked on
19 October 2026
55/100Grade C

Protection against forged senders: protected

Points per criterion

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

Findings

  • ✕SPF exceeds 10 DNS lookups (19)

    More than ten lookups (include, a, mx, ptr, exists, redirect) cause a permerror; many receivers then treat SPF as failed.

  • !SPF contains void includes (2)

    At least one include points to a domain without SPF. Usually a leftover of a retired service; it can cause a permerror.

  • !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: US
Detection confidence
100 / 100
Microsoft tenant
Managed · WALO Bertschinger AG
Tenant region
EU
Signals (7)
MXMicrosoft 365walo-ch.mail.protection.outlook.com
SPFMicrosoft 365include:spf.protection.outlook.com
DKIMMicrosoft 365selector1 → selector1-walo-ch._domainkey.walobertschinger.onmicrosoft.com
AutodiscoverMicrosoft 365autodiscover.outlook.com
NetworkMicrosoft 365AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation
Domain verificationGoogle Workspacegoogle-site-verification=0bOF8zF3k_VnKWD
Entra IDMicrosoft 365Entra-ID-Tenant (Managed)

MX servers

PrefHostIPNetworkCountryTLSA
0 walo-ch.mail.protection.outlook.com 52.101.185.12 AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US –
52.101.185.14 AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US
52.101.185.13 AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US

SPF

v=spf1 include:spf.protection.outlook.com include:spf.servers.mcsv.net include:spf.mail.walo.ch include:spf.sendinblue.com include:4353530.spf04.hubspotemail.net include:lcube-mail.de include:hades276.lcube-server.de mx -all
all
-all
DNS lookups
19 / 10
Includes
spf.protection.outlook.comspf.servers.mcsv.netspf.mail.walo.chspf.sendinblue.com4353530.spf04.hubspotemail.netlcube-mail.dehades276.lcube-server.de
Detected sending services
Microsoft 365, Brevo, HubSpot, Hornetsecurity

DMARC

v=DMARC1; p=reject; rua=mailto:it.events@walo.ch
Policy
p=reject
Subdomains (sp)
inherits p=reject
Share (pct)
100 %
Alignment DKIM/SPF
relaxed / relaxed
Aggregate reports (rua)
it.events@walo.ch

DKIM

SelectorKeydelegated to
k2 RSA 2048 dkim2.mcsv.net
k3 RSA 2048 dkim3.mcsv.net
mail RSA 1024 –
selector1 RSA 1024 selector1-walo-ch._domainkey.walobertschinger.onmicrosoft.com
selector2 RSA 1024 selector2-walo-ch._domainkey.walobertschinger.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.

GoogleAppleMeta/FacebookAtlassianMiroBrevoAutodesk

History

  • Score 55 · DMARC reject

All changes of this organisation in the change log →

Raw data 
walo.ch. IN MX 0 walo-ch.mail.protection.outlook.com.
walo.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:spf.servers.mcsv.net include:spf.mail.walo.ch include:spf.sendinblue.com include:4353530.spf04.hubspotemail.net include:lcube-mail.de include:hades276.lcube-server.de mx -all"
_dmarc.walo.ch. IN TXT "v=DMARC1; p=reject; rua=mailto:it.events@walo.ch"

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