Helion

helion.ch

Industry: Energy
Headquarters: Zuchwil, Solothurn
Type: private
Employees (approx.): 600
Checked on: 19 October 2026

51/100Grade C

Protection against forged senders: not protected (monitoring only)

Points per criterion

MX 10 / 10
SPF 15 / 15
DKIM 20 / 20
DMARC 6 / 25
DNSSEC 0 / 10
Transport (MTA-STS/DANE) 0 / 15
TLS-RPT 0 / 5

Industry avg.: 60.5 ▼ 9.5
Canton avg.: 47.9 ▲ 3.1
Overall avg.: 53.5 ▼ 2.5
Rank 30 of 43 in the industry

Findings

✕DMARC in monitoring mode only (p=none)

p=none provides reports but does not reject a single forgery. The goal is p=reject.
!SPF close to the 10-lookup limit (9)

One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
!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 · HELION
Tenant region: EU

Signals (9)

MX	Microsoft 365	`helion-ch.mail.protection.outlook.com`
SPF	Microsoft 365	`include:spf.protection.outlook.com`
DKIM	Microsoft 365	`selector1 → selector1-helion-ch._domainkey.helionch.onmicrosoft.com`
Autodiscover	Microsoft 365	`autodiscover.outlook.com`
Domain verification	Microsoft 365	`MS=ms69205459`
Network	Microsoft 365	`AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation`
Domain verification	Google Workspace	`google-site-verification=AVUHU4YvhmADAnE`
SPF	Amazon	`include:amazonses.com`
Entra ID	Microsoft 365	`Entra-ID-Tenant (Managed)`

MX servers

Pref	Host	IP	Network	Country	TLSA
0	`helion-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
		`52.101.187.1`	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation	US

SPF

v=spf1 include:spf.protection.outlook.com include:_spf.atlassian.net include:_spf.rexx-systems.com include:docebosaas.com include:4865286.spf10.hubspotemail.net include:fdspfeuc.freshemail.io include:sendgrid.net ip4:52.211.247.160 ip4:52.211.171.77 ip4:52.211.239.229 ip4:52.211.209.173 ip4:52.208.210.84 ip4:52.212.109.85 ip4:52.210.89.1 ip4:52.212.185.152 ip4:52.212.192.130 ip4:164.128.172.0/28 ip4:212.243.169.91 ip4:212.243.169.105 ip4:159.183.7.23 ip4:159.183.160.194 -all

all: -all
DNS lookups: 9 / 10
Includes: spf.protection.outlook.com_spf.atlassian.net_spf.rexx-systems.comdocebosaas.com4865286.spf10.hubspotemail.netfdspfeuc.freshemail.iosendgrid.net
Detected sending services: Microsoft 365, Atlassian, Amazon SES, HubSpot, Freshworks, SendGrid
IPv4: 29 addresses authorised directly

DMARC

v=DMARC1; p=none; rua=mailto:ydvrii6n@ag.eu.dmarcadvisor.com,mailto:ictsupport@helion.ch;

Policy: p=none
Subdomains (sp): inherits p=none
Share (pct): 100 %
Alignment DKIM/SPF: relaxed / relaxed
Aggregate reports (rua): ydvrii6n@ag.eu.dmarcadvisor.comictsupport@helion.ch
Report services: DMARC Advisor

DKIM

Selector	Key	delegated to
`a1`	RSA 2048	`a1.domainkey.u44891916.wl167.sendgrid.net`
`hs1`	RSA 2048	`helion-ch.hs01a.dkim.hubspotemail.net`
`mail`	RSA 1024	–
`s1`	RSA 2048	`s1._domainkey.atlassian.net`
`s2`	RSA 1024	`s2._domainkey.atlassian.net`
`selector1`	RSA 1024	`selector1-helion-ch._domainkey.helionch.onmicrosoft.com`
`selector2`	RSA 1024	`selector2-helion-ch._domainkey.helionch.onmicrosoft.com`
`sm`	RSA 2048	`sm.domainkey.u18785011.wl012.sendgrid.net`
`smtpapi`	RSA 1024	–

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 365GoogleAtlassianAdobeOneTrustSlackMiroBrevo

History

19 October 2026 Score 51 · DMARC none

All changes of this organisation in the change log →

Raw data

helion.ch. IN MX 0 helion-ch.mail.protection.outlook.com.
helion.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:_spf.atlassian.net include:_spf.rexx-systems.com include:docebosaas.com include:4865286.spf10.hubspotemail.net include:fdspfeuc.freshemail.io include:sendgrid.net ip4:52.211.247.160 ip4:52.211.171.77 ip4:52.211.239.229 ip4:52.211.209.173 ip4:52.208.210.84 ip4:52.212.109.85 ip4:52.210.89.1 ip4:52.212.185.152 ip4:52.212.192.130 ip4:164.128.172.0/28 ip4:212.243.169.91 ip4:212.243.169.105 ip4:159.183.7.23 ip4:159.183.160.194 -all"
_dmarc.helion.ch. IN TXT "v=DMARC1; p=none; rua=mailto:ydvrii6n@ag.eu.dmarcadvisor.com,mailto:ictsupport@helion.ch;"

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