Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
thumm-sterr.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 12:59:45 UTC · ↺ Refresh
MX Hostnames
- ncutm01.neckarcloud.de
- ncutm01.neckarcloud.de
MX Priorities
- ncutm01.neckarcloud.de: 10
- ncutm01.neckarcloud.de: 20
A / AAAA Records
- 80.150.6.143 ↩ tld.t-online.de
- 2003:2:2:15:80:150:6:143 ↩ tld.t-online.de
Mail Server IPs
- 217.237.179.194 ↩ mail.neckar.cloud
SOA Record
Raw SOA
dns01-tld.t-online.de dns.telekom.de 2023090101 21600 3600 604800 86400
Primary NS (mname)
dns01-tld.t-online.de
Admin Email (rname)
dns@telekom.de
Serial
2023090101
Refresh
21600s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
dns02-tld.t-online.de
dns01-tld.t-online.de
SPF Record
✓ Soft Fail (~all)
v=spf1 +a +mx ?all
📊 DNS lookups: 2/10
? Neutral (?all) — no enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· 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
1 record- SPFv=spf1 +a +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 thumm-sterr.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits