Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
ungertreina.ch
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-09-10 22:17:24 UTC · ↺ Refresh
MX Hostnames
- mx.kos.ch
MX Priorities
- mx.kos.ch: 10
A / AAAA Records
- 157.90.81.172 ↩ cytracon.info
Mail Server IPs
- 49.13.110.35 ↩ mx.kos.ch
- 2a01:4f8:fff0:187::35 ↩ mx.kos.ch
SOA Record
Raw SOA
ns2.kos.ch hostmaster.kos.ch 2025080461 7200 540 1209600 86400
Primary NS (mname)
ns2.kos.ch
Admin Email (rname)
hostmaster@kos.ch
Serial
2025080461
Refresh
7200s
Retry
540s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.kos.ch
ns4.kos.ch
SPF Record
✓ Strict (-all)
v=spf1 mx a:smtp.kos.ch -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 736 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a:smtp.kos.ch -all
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