Meier Tobler

meiertobler.ch

Industry: Construction & real estate
Headquarters: Schwerzenbach, Zurich
Type: listed
Employees (approx.): 1,300
Checked on: 19 October 2026

85/100Grade A

Protection against forged senders: protected

Points per criterion

MX 10 / 10
SPF 13 / 15
DKIM 20 / 20
DMARC 25 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 12 / 15
TLS-RPT 5 / 5

Industry avg.: 58.2 ▲ 26.8
Canton avg.: 53 ▲ 32
Overall avg.: 53.5 ▲ 31.5
Rank 1 of 67 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.

Check live in the Mail DNS Check →

Who runs the mail?

Mailbox provider: Microsoft 365
Provider jurisdiction: USA · MX: US
Detection confidence: 88 / 100
Microsoft tenant: Managed · Meier Tobler AG
Tenant region: EU

Signals (6)

MX	Microsoft 365	`meiertobler-ch.mail.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-meiertobler-ch._domainkey.twision.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms81979223`
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
10	`meiertobler-ch.mail.protection.outlook.com`	`52.101.187.1`	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:rdqj2g83u1.powerspf.com ~all

all: ~all
DNS lookups: 4 / 10
Includes: rdqj2g83u1.powerspf.com

DMARC

v=DMARC1; p=reject; rua=mailto:f80iz4a603@rua.powerdmarc.com; ruf=mailto:f80iz4a603@ruf.powerdmarc.com; pct=100; fo=1;

Policy: p=reject
Subdomains (sp): inherits p=reject
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): f80iz4a603@rua.powerdmarc.com
Forensic reports (ruf): f80iz4a603@ruf.powerdmarc.com
Report services: PowerDMARC

DKIM

Selector	Key	delegated to
`k2`	RSA 2048	`dkim2.mcsv.net`
`k3`	RSA 2048	`dkim3.mcsv.net`
`m1`	RSA 1024	–
`mailjet`	RSA 1024	–
`s1`	RSA 2048	`s1.domainkey.u40634320.wl071.sendgrid.net`
`s2`	RSA 2048	`s2.domainkey.u40634320.wl071.sendgrid.net`
`selector1`	RSA 2048	`selector1-meiertobler-ch._domainkey.twision.onmicrosoft.com`
`selector2`	RSA 2048	`selector2-meiertobler-ch._domainkey.twision.onmicrosoft.com`

Checked: 100 common selectors. Keys under custom selectors remain invisible.

Transport encryption

MTA-STS: Mode: enforce · max_age: 86,400 s · covers all MX: yes
mx: meiertobler-ch.mail.protection.outlook.com
DANE: missing
DNSSEC: missing
TLS-RPT: mailto:f80iz4a603@tls.powerdmarc.com
BIMI: missing

Verified services

From verification records in the domain TXT: services where the domain is verified.

Microsoft 365AtlassianDocuSign

History

19 October 2026 Score 85 · DMARC reject

All changes of this organisation in the change log →

Raw data

meiertobler.ch. IN MX 10 meiertobler-ch.mail.protection.outlook.com.
meiertobler.ch. IN TXT "v=spf1 include:rdqj2g83u1.powerspf.com ~all"
_dmarc.meiertobler.ch. IN TXT "v=DMARC1; p=reject; rua=mailto:f80iz4a603@rua.powerdmarc.com; ruf=mailto:f80iz4a603@ruf.powerdmarc.com; pct=100; fo=1;"
_mta-sts.meiertobler.ch. IN TXT "v=STSv1; id=20260528123858805691"
_smtp._tls.meiertobler.ch. IN TXT "v=TLSRPTv1; rua=mailto:f80iz4a603@tls.powerdmarc.com"

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