SIX Group
six-group.com
- Industry
- Financial services
- Headquarters
- Zürich, Zurich
- Type
- private
- Employees (approx.)
- 4,300
- Checked on
- 19 October 2026
91/100Grade A
Protection against forged senders: protected
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 25 / 25
- DNSSEC 10 / 10
- Transport (MTA-STS/DANE) 6 / 15
- TLS-RPT 5 / 5
- Industry avg.: 61.8 ▲ 29.2
- Canton avg.: 53 ▲ 38
- Overall avg.: 53.5 ▲ 37.5
- Rank 2 of 40 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.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Provider jurisdiction
- USA · MX: US
- Detection confidence
- 99 / 100
- Microsoft tenant
- Federated · SIX
- Tenant region
- EU
- Federated via
sts.six-group.com
Signals (5)
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
|---|---|---|
| DKIM | Microsoft 365 | selector1 → selector1-sixgroup-com0i._domainkey.sixgroup.onmicrosoft.com |
| Domain verification | Microsoft 365 | MS=ms79270974 |
| Domain verification | Google Workspace | google-site-verification=pL1pCZwiJR9_P3s |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Federated) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | mail5.six-group.com | 153.46.252.115 | AS9042 SIX - SIX Group Services AG | US | – |
| 10 | mail6.six-group.com | 153.46.243.116 | AS9042 SIX - SIX Group Services AG | US | – |
| 10 | mail9.six-group.com | 153.46.252.110 | AS9042 SIX - SIX Group Services AG | US | – |
| 10 | mail10.six-group.com | 153.46.243.100 | AS9042 SIX - SIX Group Services AG | US | – |
| 30 | mail7.six-group.com | 153.46.252.111 | AS9042 SIX - SIX Group Services AG | US | – |
| 30 | mail8.six-group.com | 153.46.243.118 | AS9042 SIX - SIX Group Services AG | US | – |
SPF
v=spf1 mx include:285283.spf01.hubspotemail.net include:spf.protection.outlook.com include:_spf-dc33.sapsf.eu ip4:130.214.193.81 a:smtp.cetrel.lu ip4:153.46.105.72 ip4:153.46.97.104 -all- all
-all- DNS lookups
- 5 / 10
- Includes
285283.spf01.hubspotemail.netspf.protection.outlook.com_spf-dc33.sapsf.eu- Detected sending services
- HubSpot, Microsoft 365
- IPv4
- 3 addresses authorised directly
DMARC
v=DMARC1;p=reject;rua=mailto:4be8224a45@rua.easydmarc.eu,mailto:dmarc@six-group.com;ruf=mailto:4be8224a45@ruf.easydmarc.eu,mailto:forensic.dmarc@six-group.com;fo=1;- Policy
- p=reject
- Subdomains (sp)
- inherits p=reject
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
4be8224a45@rua.easydmarc.eudmarc@six-group.com- Forensic reports (ruf)
4be8224a45@ruf.easydmarc.euforensic.dmarc@six-group.com- Report services
- EasyDMARC
DKIM
| Selector | Key | delegated to |
|---|---|---|
hs1 | RSA 2048 | six--group-com.hs01a.dkim.hubspotemail.net |
hs2 | RSA 2048 | six--group-com.hs01b.dkim.hubspotemail.net |
selector1 | RSA 2048 | selector1-sixgroup-com0i._domainkey.sixgroup.onmicrosoft.com |
selector2 | RSA 2048 | selector2-sixgroup-com0i._domainkey.sixgroup.onmicrosoft.com |
smtpapi | RSA 1024 | – |
Checked: 100 common selectors. Keys under custom selectors remain invisible.
Transport encryption
- MTA-STS
- MTA-STS policy not reachable
- DANE
- missing
- DNSSEC
- active
- TLS-RPT
mailto:4be8224a45@tls.easydmarc.comtlsrpt@six-group.com- BIMI
- missing
Verified services
From verification records in the domain TXT: services where the domain is verified.
Microsoft 365GoogleAtlassianDocuSignAdobeCisco WebexOneTrust
History
- Score 91 · DMARC reject
Raw data
six-group.com. IN MX 10 mail5.six-group.com.
six-group.com. IN MX 10 mail6.six-group.com.
six-group.com. IN MX 10 mail9.six-group.com.
six-group.com. IN MX 10 mail10.six-group.com.
six-group.com. IN MX 30 mail7.six-group.com.
six-group.com. IN MX 30 mail8.six-group.com.
six-group.com. IN TXT "v=spf1 mx include:285283.spf01.hubspotemail.net include:spf.protection.outlook.com include:_spf-dc33.sapsf.eu ip4:130.214.193.81 a:smtp.cetrel.lu ip4:153.46.105.72 ip4:153.46.97.104 -all"
_dmarc.six-group.com. IN TXT "v=DMARC1;p=reject;rua=mailto:4be8224a45@rua.easydmarc.eu,mailto:dmarc@six-group.com;ruf=mailto:4be8224a45@ruf.easydmarc.eu,mailto:forensic.dmarc@six-group.com;fo=1;"
_mta-sts.six-group.com. IN TXT "v=STSv1; id=20250915T141111"
_smtp._tls.six-group.com. IN TXT "v=TLSRPTv1; rua=mailto:4be8224a45@tls.easydmarc.com,tlsrpt@six-group.com"