Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
b12-tuebingen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 20:40:40 UTC · ↺ Refresh
MX Hostnames
- mail.b12-tuebingen.de
MX Priorities
- mail.b12-tuebingen.de: 10
A / AAAA Records
- 92.205.26.53 ↩ 53.26.205.92.host.secureserver.net
Mail Server IPs
- 83.169.32.253 ↩ kappa01.digital-worx.de
SOA Record
Raw SOA
nsa8.schlundtech.de rahlfs.digital-worx.de 2025032505 43200 7200 1209600 600
Primary NS (mname)
nsa8.schlundtech.de
Admin Email (rname)
rahlfs@digital-worx.de
Serial
2025032505
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
nsb8.schlundtech.de
nsd8.schlundtech.de
nsc8.schlundtech.de
nsa8.schlundtech.de
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:92.205.26.53 ip4:5.35.242.138 include:secureserver.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx ip4:92.205.26.53 ip4:5.35.242.138 include:secureserver.net -all
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