Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
naturheilpraxiskoenig.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 00:58:17 UTC · ↺ Refresh
MX Hostnames
- kdmail.regio-concept.info
- kd-mail3.duf.de
- hmsmailbak.heise.de
MX Priorities
- kd-mail3.duf.de: 100
- kdmail.regio-concept.info: 10
- hmsmailbak.heise.de: 100
A / AAAA Records
- 193.99.144.221 (no PTR)
Mail Server IPs
- 192.166.167.141 ↩ kd-mail3.duf.de
- 2a00:e68:14:908::141 ↩ kd-mail3.duf.de
- 193.99.144.222 (no PTR)
- 193.100.232.87 ↩ hmsmailbak.heise.de
- 2a00:e68:14:801:1462:97ff:fe63:5403 ↩ hmsmailbak.heise.de
SOA Record
Raw SOA
ns.duf.de administrator.duf.de 2024071409 28800 900 1728000 3600
Primary NS (mname)
ns.duf.de
Admin Email (rname)
administrator@duf.de
Serial
2024071409
Refresh
28800s
Retry
900s
Expire
1728000s
Minimum TTL
3600s
Nameservers (NS)
ns.duf.de
dufdns.work.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate 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 mx ~all
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 naturheilpraxiskoenig.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits