Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kiefer-zehner.de
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 14:40:12 UTC · ↺ Refresh
MX Hostnames
- d323842.a.ess.de.barracudanetworks.com
- d323842.b.ess.de.barracudanetworks.com
MX Priorities
- d323842.a.ess.de.barracudanetworks.com: 0
- d323842.b.ess.de.barracudanetworks.com: 10
A / AAAA Records
- 217.160.0.70 ↩ 217-160-0-70.elastic-ssl.ui-r.com
Mail Server IPs
- 18.185.115.251 ↩ mail.ess.de.barracuda.com
- 18.185.115.252 ↩ mail.ess.de.barracuda.com
- 18.185.115.250 ↩ mail.ess.de.barracuda.com
SOA Record
Raw SOA
ns1051.ui-dns.biz hostmaster.1und1.de 2017071192 28800 7200 604800 300
Primary NS (mname)
ns1051.ui-dns.biz
Admin Email (rname)
hostmaster@1und1.de
Serial
2017071192
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1051.ui-dns.org
ns1051.ui-dns.com
ns1051.ui-dns.biz
ns1051.ui-dns.de
SPF Record
✓ Strict (-all)
v=spf1 include:spf.ess.de.barracudanetworks.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; 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
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- v=verifydomain MS=4373640
- SPFv=spf1 include:spf.ess.de.barracudanetworks.com include:spf.protection.outlook.com -all
- google-site-verification=IPgYb5X0W5xaHD9rMbY8PEak9LHvD3jdcA-MtAB5lVo
- MS=9BBF1FA3D36B029D4C334276F44E0221FABE6E5A
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 kiefer-zehner.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits