Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tuebingen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 10:39:33 UTC · ↺ Refresh
MX Hostnames
- mx8.kvnbw.de
- mx7.kvnbw.de
- mx6.kvnbw.de
- mx9.kvnbw.de
MX Priorities
- mx8.kvnbw.de: 10
- mx7.kvnbw.de: 10
- mx9.kvnbw.de: 10
- mx6.kvnbw.de: 10
A / AAAA Records
- 193.197.23.51 ↩ www.tuebingen.de
- 2001:7c7:1708::3 ↩ www.tuebingen.de
Mail Server IPs
- 194.59.36.34 ↩ mx8.kvnbw.de
- 194.0.94.49 ↩ mx7.kvnbw.de
- 194.59.36.35 ↩ mx9.kvnbw.de
- 194.0.94.48 ↩ mx6.kvnbw.de
SOA Record
Raw SOA
ns1.tuebingen.de hostmaster.tuebingen.de 2026032002 21600 1800 2419200 86400
Primary NS (mname)
ns1.tuebingen.de
Admin Email (rname)
hostmaster@tuebingen.de
Serial
2026032002
Refresh
21600s
Retry
1800s
Expire
2419200s
Minimum TTL
86400s
Nameservers (NS)
ns1.tuebingen.de
dns5.belwue.de
dns1.belwue.de
dns3.belwue.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx include:spf.protect.kvnbw.de a:smtpdvd1.kvnbw.de a:smtpdvd2.kvnbw.de include:spf.protection.outlook.com include:_spf.belwue.de ip4:193.197.23.36 ip4:159.69.143.158 ip4:94.16.113.42 ip4:85.214.133.98 ip6:2a01:4f8:231:25dc::2 a:ferienprogramm-online.de ~all
📊 DNS lookups: 7/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=r; aspf=s; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
2 records- google-site-verification=6AMFFUeCeKX3TcI44SsQiftxrsNPHURDpwKm7Sxed9w
- SPFv=spf1 mx include:spf.protect.kvnbw.de a:smtpdvd1.kvnbw.de a:smtpdvd2.kvnbw.de include:spf.protection.outlook.com include:_spf.belwue.de ip4:193.197.23.36 ip4:159.69.143.158 ip4:94.16.113.42 ip4:85.214.133.98 ip6:2a01:4f8:231:25dc::2 a:ferienprogramm-online.de ~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 tuebingen.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits