Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
npb-online.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 03:36:26 UTC · ↺ Refresh
MX Hostnames
- esa01.mx-rec.de
MX Priorities
- esa01.mx-rec.de: 10
A / AAAA Records
- 78.46.144.89 ↩ dedi6910.your-server.de
Mail Server IPs
- 46.189.64.32 ↩ esa.paar-it.de
SOA Record
Raw SOA
ns.inwx.de hostmaster.inwx.de 2025111100 10800 3600 604800 3600
Primary NS (mname)
ns.inwx.de
Admin Email (rname)
hostmaster@inwx.de
Serial
2025111100
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns3.inwx.de
ns2.inwx.de
ns.inwx.de
SPF Record
✓ Strict (-all)
v=spf1 a include:spf.mx-rec.de -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
4 records- _globalsign-domain-verification=vPWp61XSMfyInLsBNQokIOj0qp7SBpoVZLGsx0khsn
- q5vl4vmb5ihqf46pqr7ri1ldg6v
- SPFv=spf1 a include:spf.mx-rec.de -all
- D-TRUST=BQ2VWHBNZMCXX4VKXK77XTL
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 npb-online.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits