Stadt Uster
uster.ch
- Industry
- Municipalities
- Headquarters
- Uster, Zurich
- Type
- public
- Population
- 37,031
- FSO no.
- 198
- Checked on
- 19 October 2026
64/100Grade C
Protection against forged senders: largely protected
Points per criterion
- MX 10 / 10
- SPF 15 / 15
- DKIM 20 / 20
- DMARC 19 / 25
- DNSSEC 0 / 10
- Transport (MTA-STS/DANE) 0 / 15
- TLS-RPT 0 / 5
- Industry avg.: 50.9 ▲ 13.1
- Canton avg.: 53 ▲ 11
- Overall avg.: 53.5 ▲ 10.5
- Rank 695 of 2077 in the industry
Findings
-
!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.
Who runs the mail?
- Mailbox provider
- Microsoft 365
- Upstream gateway
- Abraxas
- Provider jurisdiction
- USA · MX: CH
- Detection confidence
- 92 / 100
- Microsoft tenant
- Managed · uster.ch
- Tenant region
- EU
Signals (5)
| SPF | Microsoft 365 | include:spf.protection.outlook.com |
|---|---|---|
| Autodiscover | Microsoft 365 | autodiscover.outlook.com |
| Domain verification | Microsoft 365 | MS=ms91238562 |
| SPF | Amazon | include:amazonses.com |
| Entra ID | Microsoft 365 | Entra-ID-Tenant (Managed) |
MX servers
| Pref | Host | IP | Network | Country | TLSA |
|---|---|---|---|---|---|
| 10 | mta1.abxsec.com | 193.246.95.101 | AS9108 ABXnet - Abraxas Informatik AG | CH | – |
| 10 | mta2.abxsec.com | 193.246.95.121 | AS9108 ABXnet - Abraxas Informatik AG | CH | – |
SPF
v=spf1 ip4:193.246.95.101 ip4:193.246.95.121 ip6:2a02:c382:0:8007::101 ip6:2a02:c382:0:8007::121 ip4:194.209.75.192/26 ip4:195.65.10.12 ip4:195.65.10.13 ip4:195.65.10.14 ip4:195.65.10.15 ip4:167.89.53.198 ip4:149.72.40.42 ip4:167.89.89.155 ip4:217.26.48.124 ip4:217.26.48.146 ip4:217.26.48.147 ip4:217.26.48.121 ip6:2a00:d70:0:a::e0 ip6:2a00:d70:0:13::100 ip6:2a00:d70:0:14::100 ip6:2a00:d70:0:a::e1 include:_spf.abxsec.com include:spf.umantis.com include:spf.abacuscity.ch include:spf.iway.ch include:spf.protection.outlook.com include:mandrillapp.com include:_spf.atlassian.net -all- all
-all- DNS lookups
- 9 / 10
- Includes
_spf.abxsec.comspf.umantis.comspf.abacuscity.chspf.iway.chspf.protection.outlook.commandrillapp.com_spf.atlassian.net- Detected sending services
- Microsoft 365, Mailchimp/Mandrill, Mailchimp Transactional, Atlassian, Amazon SES
- IPv4
- 77 addresses authorised directly
DMARC
v=DMARC1; p=quarantine; rua=mailto:postmaster@uster.ch; ruf=mailto:postmaster@uster.ch; fo=s;- Policy
- p=quarantine
- Subdomains (sp)
- inherits p=quarantine
- Share (pct)
- 100 %
- Alignment DKIM/SPF
- relaxed / relaxed
- Aggregate reports (rua)
postmaster@uster.ch- Forensic reports (ruf)
postmaster@uster.ch
DKIM
| Selector | Key | delegated to |
|---|---|---|
k2 | RSA 2048 | dkim2.mcsv.net |
k3 | RSA 2048 | dkim3.mcsv.net |
s1 | RSA 2048 | s1.domainkey.u2309200.wl201.sendgrid.net |
s2 | RSA 1024 | s2.domainkey.u2309200.wl201.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.
Microsoft 365AtlassianAdobe
History
- Score 64 · DMARC quarantine
Raw data
uster.ch. IN MX 10 mta1.abxsec.com.
uster.ch. IN MX 10 mta2.abxsec.com.
uster.ch. IN TXT "v=spf1 ip4:193.246.95.101 ip4:193.246.95.121 ip6:2a02:c382:0:8007::101 ip6:2a02:c382:0:8007::121 ip4:194.209.75.192/26 ip4:195.65.10.12 ip4:195.65.10.13 ip4:195.65.10.14 ip4:195.65.10.15 ip4:167.89.53.198 ip4:149.72.40.42 ip4:167.89.89.155 ip4:217.26.48.124 ip4:217.26.48.146 ip4:217.26.48.147 ip4:217.26.48.121 ip6:2a00:d70:0:a::e0 ip6:2a00:d70:0:13::100 ip6:2a00:d70:0:14::100 ip6:2a00:d70:0:a::e1 include:_spf.abxsec.com include:spf.umantis.com include:spf.abacuscity.ch include:spf.iway.ch include:spf.protection.outlook.com include:mandrillapp.com include:_spf.atlassian.net -all"
_dmarc.uster.ch. IN TXT "v=DMARC1; p=quarantine; rua=mailto:postmaster@uster.ch; ruf=mailto:postmaster@uster.ch; fo=s;"