kucera.biz

Valid Email Server
Domain Lookup › kucera.biz

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
kucera.biz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 19:00:38 UTC · ↺ Refresh

MX Hostnames

  • mail.kucera.biz
  • mx00.kundenserver.de

MX Priorities

  • mail.kucera.biz: 10
  • mx00.kundenserver.de: 40

A / AAAA Records

  • 217.160.0.209 ↩ 217-160-0-209.elastic-ssl.ui-r.com

Mail Server IPs

  • 62.4.89.254 ↩ mail.kucera.biz
  • 212.227.15.41 ↩ mx00.kundenserver.de

SOA Record

Raw SOA ns1124.ui-dns.biz hostmaster.1und1.de 2016110436 28800 7200 604800 300
Primary NS (mname)
ns1124.ui-dns.biz
Admin Email (rname)
hostmaster@1und1.de
Serial
2016110436
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1124.ui-dns.de
ns1124.ui-dns.com
ns1124.ui-dns.org
ns1124.ui-dns.biz

SPF Record

✓ Strict (-all)
v=spf1 mx a:sendgrid.net include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • SPFv=spf1 mx a:sendgrid.net include:spf.protection.outlook.com -all
  • OVUFUZ75OaMWzOzu8J86nDD9US4bfUm6esoFhhQhb54eHN5IqMpH+dHFLWW++AHwW/bQ3Fk8QJsk1szLaP+ALQ==
  • v=verifydomain MS=1423714
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