Kessler & Co
kessler.ch
- Industry
- Financial services
- Headquarters
- Zürich, Zurich
- Type
- private
- Employees (approx.)
- 300
- Checked on
- 19 October 2026
Protection against forged senders: not protected
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 0 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 61.8 ▼ 16.8
- Canton avg.: 53 ▼ 8
- Overall avg.: 53.5 ▼ 8.5
- Rank 35 of 40 in the industry
Findings
-
✕No DMARC record
Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.
-
!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.
Who runs the mail?
- Mailbox provider
- Self-hosted / other
- Provider jurisdiction
- Switzerland · MX: CH
- Detection confidence
- 85 / 100
- Microsoft tenant
- Managed · Kessler & Co AG
- Tenant region
- EU
Signals (3)
| Domain verification | Swiss hoster | protonmail-verification=16d4bcc6c4bd9c18 |
|---|---|---|
| Network | Swiss hoster | AS15576 NTS - NTS workspace AG |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | zhmx.kessler.ch | 212.103.80.71 | AS15576 NTS - NTS workspace AG | CH | – |
| 20 | lsmx.kessler.ch | 212.103.80.87 | AS15576 NTS - NTS workspace AG | CH | – |
SPF
v=spf1 mx include:spf.umantis.com include:_spf01.eyevip.ch -all- all
-all- DNS lookups
- 3 / 10
- Includes
spf.umantis.com_spf01.eyevip.ch
DMARC
Without DMARC no receiver reliably rejects forged mail in the domain's name, and the organisation receives no abuse reports.
DKIM
| Selector | Key | delegated to |
|---|---|---|
s1 | RSA 2048 | s1.domainkey.u34712596.wl097.sendgrid.net |
s2 | RSA 2048 | s2.domainkey.u34712596.wl097.sendgrid.net |
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.
Atlassian
History
- Score 45 · DMARC -
Raw data
kessler.ch. IN MX 10 zhmx.kessler.ch.
kessler.ch. IN MX 20 lsmx.kessler.ch.
kessler.ch. IN TXT "v=spf1 mx include:spf.umantis.com include:_spf01.eyevip.ch -all"