leibniz-kis.de

Valid Email Server
Domain Lookup › leibniz-kis.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
leibniz-kis.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-03 09:40:17 UTC · ↺ Refresh

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MX Hostnames

  • b1671.mx.srv.dfn.de
  • c1671.mx.srv.dfn.de
  • a1671.mx.srv.dfn.de

MX Priorities

  • c1671.mx.srv.dfn.de: 10
  • a1671.mx.srv.dfn.de: 10
  • b1671.mx.srv.dfn.de: 10

A / AAAA Records

  • 193.197.56.3 ↩ ads0.leibniz-kis.de
  • 193.197.56.4 ↩ ads1.leibniz-kis.de
  • 2002:c1c5:3804::c1c5:3804 (no PTR)
  • 2002:c1c5:3803::c1c5:3803 (no PTR)

Mail Server IPs

  • 194.95.238.106 ↩ c1671.mx.srv.dfn.de
  • 194.95.232.106 ↩ a1671.mx.srv.dfn.de
  • 194.95.234.106 ↩ b1671.mx.srv.dfn.de

SOA Record

Raw SOA dns.leibniz-kis.de hostmaster.leibniz-kis.de 2026040815 3600 1800 604800 600
Primary NS (mname)
dns.leibniz-kis.de
Admin Email (rname)
hostmaster@leibniz-kis.de
Serial
2026040815
Refresh
3600s
Retry
1800s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

dns1.belwue.de
dns3.belwue.de
dns.leibniz-kis.de

SPF Record

✓ Strict (-all)
v=spf1 ip4:193.197.59.4/32 a:mail.leibniz-kis.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 1 found
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: mail

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

All TXT Records

1 record
  • SPFv=spf1 ip4:193.197.59.4/32 a:mail.leibniz-kis.de -all
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