Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cbs-heidelberg.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 15:27:30 UTC · ↺ Refresh
MX Hostnames
- mx9.kvnbw.de
- mx7.kvnbw.de
- mx8.kvnbw.de
- mx6.kvnbw.de
MX Priorities
- mx9.kvnbw.de: 10
- mx6.kvnbw.de: 10
- mx7.kvnbw.de: 10
- mx8.kvnbw.de: 10
A / AAAA Records
- 141.19.239.91 ↩ cbs-heidelberg.de
Mail Server IPs
- 194.59.36.35 ↩ mx9.kvnbw.de
- 194.0.94.48 ↩ mx6.kvnbw.de
- 194.0.94.49 ↩ mx7.kvnbw.de
- 194.59.36.34 ↩ mx8.kvnbw.de
SOA Record
Raw SOA
dns1.belwue.de hostmaster.belwue.de 2023011907 21600 1800 2419200 300
Primary NS (mname)
dns1.belwue.de
Admin Email (rname)
hostmaster@belwue.de
Serial
2023011907
Refresh
21600s
Retry
1800s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
dns3.belwue.de
dns1.belwue.de
dns5.belwue.de
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:141.19.239.92/32 ip4:141.19.239.93/32 include:spf.protect.kvnbw.de -all
📊 DNS lookups: 2/10
✓ 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
4 records- Carl-Bosch-Schule, Mannheimerstr. 23, 69115 Heidelberg
- MS=CF204CB6ED57FAED96D8221968E08724805D1FF6
- SPFv=spf1 mx ip4:141.19.239.92/32 ip4:141.19.239.93/32 include:spf.protect.kvnbw.de -all
- apple-domain-verification=TyC80NIzpLsAjYV6
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