Adecco Group

adeccogroup.com

Industry: Staffing & facility services
Headquarters: Zürich, Zurich
Type: listed
Employees (approx.): 41,000
Checked on: 19 October 2026

70/100Grade B

Protection against forged senders: protected, with a gap: subdomains not protected (sp=none)

Points per criterion

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

Industry avg.: 60.9 ▲ 9.1
Canton avg.: 53 ▲ 17
Overall avg.: 53.5 ▲ 16.5
Rank 4 of 15 in the industry

Findings

!SPF close to the 10-lookup limit (10)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!Subdomains unprotected (sp=none)

The main domain is protected, but subdomains such as invoice.company.ch can still be forged.
!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: 86 / 100
Microsoft tenant: Managed · Adecco
Tenant region: EU

Signals (7)

MX	Microsoft 365	`adeccogroup-com.mail.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-adeccogroup-com._domainkey.inoffice.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=BCa8RKHeQtP-s1x`
Domain verification	Amazon	`amazonses:GpuIzvpNO38dv4tKlGc+50EFau4oeC`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
10	`adeccogroup-com.mail.protection.outlook.com`	`52.101.103.143`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.185.24`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.209.153`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 redirect=756j1ce2._spf._d.mim.ec

all: -all
DNS lookups: 10 / 10
Includes: 756j1ce2._spf._d.mim.ec756j1ce21._spf._d.mim.ec
IPv4: 4,864 addresses authorised directly

DMARC

v=DMARC1; p=reject; rua=mailto:2cd9750f0d9c816@rep.dmarcanalyzer.com; ruf=mailto:2cd9750f0d9c816@for.dmarcanalyzer.com; fo=1; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=none

Policy: p=reject
Subdomains (sp): none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): 2cd9750f0d9c816@rep.dmarcanalyzer.com
Forensic reports (ruf): 2cd9750f0d9c816@for.dmarcanalyzer.com

DKIM

Selector	Key	delegated to
`cm`	RSA 1024	–
`dk`	RSA 1024	–
`fm1`	RSA 2048	`fm1-10325-adeccogroup-com.fmdkim.net`
`fm2`	RSA 2048	`fm2-10325-adeccogroup-com.fmdkim.net`
`fm3`	RSA 2048	`fm3-9995-adeccogroup-com.fmdkim.net`
`k1`	RSA 1024	`dkim.mcsv.net`
`m2`	RSA 1024	–
`mailjet`	RSA 1024	–
`mandrill`	RSA 1024	–
`s1`	RSA 2048	`s1.domainkey.u1632140.wl141.sendgrid.net`
`salesforce`	RSA 1024	–
`selector1`	RSA 2048	`selector1-adeccogroup-com._domainkey.inoffice.onmicrosoft.com`
`selector2`	RSA 2048	`selector2-adeccogroup-com._domainkey.inoffice.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.

GoogleAtlassianDocuSignAmazon SESOneTrustTwilio/SendGridFigma

History

18 October 2026 Score 70 · DMARC reject

All changes of this organisation in the change log →

Raw data

adeccogroup.com. IN MX 10 adeccogroup-com.mail.protection.outlook.com.
adeccogroup.com. IN TXT "v=spf1 redirect=756j1ce2._spf._d.mim.ec"
_dmarc.adeccogroup.com. IN TXT "v=DMARC1; p=reject; rua=mailto:2cd9750f0d9c816@rep.dmarcanalyzer.com; ruf=mailto:2cd9750f0d9c816@for.dmarcanalyzer.com; fo=1; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=none"

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