Comet

comet.tech

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

81/100Grade 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) 6 / 15
TLS-RPT 5 / 5

Industry avg.: 62.2 ▲ 18.8
Canton avg.: 49.3 ▲ 31.7
Overall avg.: 53.5 ▲ 27.5
Rank 7 of 112 in the industry

Findings

✕MTA-STS policy not reachable

The TXT record exists but the policy file at mta-sts.<domain> cannot be fetched, so MTA-STS has no effect.
!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.
iStrict DMARC alignment

adkim=s or aspf=s requires exact domain matches. Secure, but demanding when sending from subdomains.

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 · Comet
Tenant region: EU

Signals (7)

MX	Microsoft 365	`comet-tech.mail.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-comet-tech._domainkey.cometgrp.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms37497416`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=yGK1iL8riyTKdGL`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
0	`comet-tech.mail.protection.outlook.com`	`52.101.185.24`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US	–
		`52.101.209.31`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US
		`52.101.73.120`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 include:_u.comet.tech._spf.dmarcla.com -all

all: -all
DNS lookups: 5 / 10
Includes: _u.comet.tech._spf.dmarcla.com

DMARC

v=DMARC1; p=reject; rua=mailto:60f56e230e488@ag.dmarcly.com; ruf=mailto:60f56e230e488@fo.dmarcly.com; sp=reject; adkim=s; aspf=s; pct=100; fo=1;

Policy: p=reject
Subdomains (sp): reject
Share (pct): 100 %
Alignment DKIM/SPF: strict / strict
Aggregate reports (rua): 60f56e230e488@ag.dmarcly.com
Forensic reports (ruf): 60f56e230e488@fo.dmarcly.com
Report services: Dmarcly

DKIM

Selector	Key	delegated to
`s1`	RSA 2048	`s1.domainkey.u4965479.wl230.sendgrid.net`
`s2`	RSA 1024	`s2.domainkey.u4965479.wl230.sendgrid.net`
`selector1`	RSA 2048	`selector1-comet-tech._domainkey.cometgrp.onmicrosoft.com`
`selector2`	RSA 1024	`s2.domainkey.u4965479.wl230.sendgrid.net`

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

Transport encryption

MTA-STS: MTA-STS policy not reachable
DANE: missing
DNSSEC: missing
TLS-RPT: mailto:60f56e230e488@tls.dmarcly.com
BIMI: missing

Verified services

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

Microsoft 365GoogleAppleAtlassianZoomOneTrustKnowBe4FigmaTeamViewer

History

18 October 2026 Score 81 · DMARC reject

All changes of this organisation in the change log →

Raw data

comet.tech. IN MX 0 comet-tech.mail.protection.outlook.com.
comet.tech. IN TXT "v=spf1 include:_u.comet.tech._spf.dmarcla.com -all"
_dmarc.comet.tech. IN TXT "v=DMARC1; p=reject; rua=mailto:60f56e230e488@ag.dmarcly.com; ruf=mailto:60f56e230e488@fo.dmarcly.com; sp=reject; adkim=s; aspf=s; pct=100; fo=1;"
_mta-sts.comet.tech. IN TXT "v=STSv1; id=1690283921169"
_smtp._tls.comet.tech. IN TXT "v=TLSRPTv1; rua=mailto:60f56e230e488@tls.dmarcly.com"

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