Tellco
tellco.ch
- Industry
- Pension funds
- Headquarters
- Schwyz, Schwyz
- Type
- private
- Checked on
- 19 October 2026
Protection against forged senders: largely protected
Points per criterion
- MX 10 / 10
- SPF 13 / 15
- DKIM 20 / 20
- DMARC 19 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 12 / 15
- TLS-RPT 0 / 5
- Industry avg.: 45.1 ▲ 28.9
- Canton avg.: 59.7 ▲ 14.3
- Overall avg.: 53.5 ▲ 20.5
- Rank 7 of 59 in the industry
Findings
-
!SPF close to the 10-lookup limit (8)
One more sending service can break the limit. Flattening or subdomains for third parties create headroom.
-
!External report receiver not authorised
The authorisation record for an external rua domain is missing (RFC 7489 §7.1); many receivers then send no 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.
-
iDANE active (TLSA with DNSSEC)
All MX hosts publish TLSA records secured by DNSSEC.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Upstream gateway
- SEPPmail
- Provider jurisdiction
- USA · MX: CH
- Detection confidence
- 100 / 100
- Microsoft tenant
- Managed · FOUNDERS BANK
- Tenant region
- EU
Signals (6)
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
|---|---|---|
| DKIM | Microsoft 365 | selector1 → selector1-tellco-ch._domainkey.tellconet.w-v1.dkim.mail.microsoft |
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Domain verification | Microsoft 365 | MS=ms53851457 |
| Domain verification | Google Workspace | google-site-verification=5bvLOXbOPIMFQms |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | tellco-ch.gate.seppmail.cloud | 86.119.35.35 | AS559 Switch - SWITCH | CH | ✓ DNSSEC |
217.20.196.81 | AS24951 EVERYWARE-NET - EveryWare AG | CH |
SPF
v=spf1 include:spf.protection.outlook.com include:spf-de.emailsignatures365.com include:_spf.psm.knowbe4.com include:_spf.ch.seppmail.cloud a:mail.ostendis.ch include:mxsspf.sendpulse.com include:_hspf.hubspotemail.net include:spf.protection.infrontfinance.com ~all- all
~all- DNS lookups
- 8 / 10
- Includes
spf.protection.outlook.comspf-de.emailsignatures365.com_spf.psm.knowbe4.com_spf.ch.seppmail.cloudmxsspf.sendpulse.com_hspf.hubspotemail.netspf.protection.infrontfinance.com- Detected sending services
- Microsoft 365, SEPPmail, HubSpot
DMARC
v=DMARC1; p=quarantine; rua=mailto:59ac38d25765445ea791280f744d6be9@dmarc-reports.cloudflare.net,mailto:dmarc@headitsolutions.ch,mailto:dmarc@tellco.ch;- Policy
- p=quarantine
- Subdomains (sp)
- inherits p=quarantine
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
59ac38d25765445ea791280f744d6be9@dmarc-reports.cloudflare.netdmarc@headitsolutions.chdmarc@tellco.ch- Report services
- Cloudflare
DKIM
| Selector | Key | delegated to |
|---|---|---|
default | RSA 2048 | – |
s1 | RSA 2048 | s1.domainkey.u52756877.wl128.sendgrid.net |
s2 | RSA 2048 | s2.domainkey.u52756877.wl128.sendgrid.net |
selector1 | RSA 2048 | selector1-tellco-ch._domainkey.tellconet.w-v1.dkim.mail.microsoft |
Checked: 100 common selectors. Keys under custom selectors remain invisible.
Transport encryption
- MTA-STS
- missing
- DANE
- active
- DNSSEC
- missing
- TLS-RPT
- missing
- BIMI
- missing
Verified services
From verification records in the domain TXT: services where the domain is verified.
Microsoft 365GoogleAppleAtlassian
History
- Score 74 · DMARC quarantine
Raw data
tellco.ch. IN MX 10 tellco-ch.gate.seppmail.cloud.
tellco.ch. IN TXT "v=spf1 include:spf.protection.outlook.com include:spf-de.emailsignatures365.com include:_spf.psm.knowbe4.com include:_spf.ch.seppmail.cloud a:mail.ostendis.ch include:mxsspf.sendpulse.com include:_hspf.hubspotemail.net include:spf.protection.infrontfinance.com ~all"
_dmarc.tellco.ch. IN TXT "v=DMARC1; p=quarantine; rua=mailto:59ac38d25765445ea791280f744d6be9@dmarc-reports.cloudflare.net,mailto:dmarc@headitsolutions.ch,mailto:dmarc@tellco.ch;"