Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
thomas-klug.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-06 15:16:25 UTC · ↺ Refresh
MX Hostnames
- mail.thomas-klug.de
MX Priorities
- mail.thomas-klug.de: 10
A / AAAA Records
- 89.22.112.167 ↩ mail.data10-btb.de
Mail Server IPs
- 89.22.112.167 ↩ mail.data10-btb.de
SOA Record
Raw SOA
a.ns14.net office.thomas-klug.de 2022011301 43200 7200 1209600 86400
Primary NS (mname)
a.ns14.net
Admin Email (rname)
office@thomas-klug.de
Serial
2022011301
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
b.ns14.net
c.ns14.net
d.ns14.net
a.ns14.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a include:spf.mailjet.com ~all
📊 DNS lookups: 3/10
~ 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 a include:spf.mailjet.com ~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 thomas-klug.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits