LEM

lem.com

Industry: Machinery & electrical
Headquarters: Meyrin, Geneva
Type: listed
Employees (approx.): 1,600
Checked on: 19 October 2026

70/100Grade B

Protection against forged senders: protected

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.: 62.2 ▲ 7.8
Canton avg.: 51.9 ▲ 18.1
Overall avg.: 53.5 ▲ 16.5
Rank 31 of 112 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: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 100 / 100
Microsoft tenant: Managed · LEM International SA
Tenant region: EU

Signals (7)

MX	Microsoft 365	`lem-com.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-lem-com._domainkey.lemgroup.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms27165722`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
1	`lem-com.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:smtp.dfinet.ch include:spf.lem.com include:europe.o365.crossware.co.nz include:eu-k1.o365.crossware.co.nz include:mailing.eqs.com -all

all: -all
DNS lookups: 7 / 10
Includes: spf.protection.outlook.comsmtp.dfinet.chspf.lem.comeurope.o365.crossware.co.nzeu-k1.o365.crossware.co.nzmailing.eqs.com
Detected sending services: Microsoft 365, Mailjet

DMARC

v=DMARC1; p=reject; rua=mailto:rua-reports@lem.com; ruf=mailto:ruf-reports@lem.com

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): rua-reports@lem.com
Forensic reports (ruf): ruf-reports@lem.com

DKIM

Selector	Key	delegated to
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`mailjet`	RSA 1024	–
`selector1`	RSA 1024	`selector1-lem-com._domainkey.lemgroup.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 365AppleAtlassianOneTrust

History

18 October 2026 Score 70 · DMARC reject

All changes of this organisation in the change log →

Raw data

lem.com. IN MX 1 lem-com.mail.protection.outlook.com.
lem.com. IN TXT "v=spf1 include:spf.protection.outlook.com include:smtp.dfinet.ch include:spf.lem.com include:europe.o365.crossware.co.nz include:eu-k1.o365.crossware.co.nz include:mailing.eqs.com -all"
_dmarc.lem.com. IN TXT "v=DMARC1; p=reject; rua=mailto:rua-reports@lem.com; ruf=mailto:ruf-reports@lem.com"

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