Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kk-bochum.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 16:52:26 UTC · ↺ Refresh
MX Hostnames
- mailext01.knappschaft-kliniken.de
- mailext02.knappschaft-kliniken.de
MX Priorities
- mailext02.knappschaft-kliniken.de: 20
- mailext01.knappschaft-kliniken.de: 10
A / AAAA Records
- 212.23.140.221 (no PTR)
Mail Server IPs
- 212.23.143.116 ↩ mailext02.knappschaft-kliniken.de
- 212.23.143.115 ↩ mailext01.knappschaft-kliniken.de
SOA Record
Raw SOA
adns01.de.tmr.net hostmaster.kk-bochum.de 1771501440 10800 1800 604800 3600
Primary NS (mname)
adns01.de.tmr.net
Admin Email (rname)
hostmaster@kk-bochum.de
Serial
1771501440
Refresh
10800s
Retry
1800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
adns02.de.tmr.net
adns01.de.tmr.net
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:212.23.143.115 ip4:212.23.143.116 ip4:212.23.143.117 -all
📊 DNS lookups: 1/10
✓ 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
3 records- _ophi8r77cp2dcnbidvsmlmy7lihvvyr
- SPFv=spf1 mx ip4:212.23.143.115 ip4:212.23.143.116 ip4:212.23.143.117 -all
- cisco-ci-domain-verification=26181048e599b5e797ad45c6c1d51d611651c4bdd86d268c1db6dc6273c2322f
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for kk-bochum.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits