duellberg-konzentra.de

Valid Email Server
Domain Lookup › duellberg-konzentra.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
duellberg-konzentra.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-01 14:23:07 UTC · ↺ Refresh

MX Hostnames

  • mx04.hornetsecurity.com
  • mx01.hornetsecurity.com
  • mx03.hornetsecurity.com
  • mx02.hornetsecurity.com

MX Priorities

  • mx01.hornetsecurity.com: 10
  • mx02.hornetsecurity.com: 20
  • mx04.hornetsecurity.com: 40
  • mx03.hornetsecurity.com: 30

A / AAAA Records

  • 185.175.196.89 (no PTR)
  • 2a00:1c98:60:1301::72ac:c841 (no PTR)

Mail Server IPs

  • 94.100.132.8 ↩ mx01.hornetsecurity.com
  • 94.100.136.8 ↩ mx02.hornetsecurity.com
  • 94.100.136.7 ↩ mx04.hornetsecurity.com
  • 94.100.134.8 ↩ mx03.hornetsecurity.com

SOA Record

Raw SOA ns65.1und1.de hostmaster.1und1.de 2010033125 28800 7200 604800 300
Primary NS (mname)
ns65.1und1.de
Admin Email (rname)
hostmaster@1und1.de
Serial
2010033125
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns66.1und1.de
ns65.1und1.de

SPF Record

✓ Soft Fail (~all)
v=spf1 redirect=duellberg-konzentra.de.spf.hornetdmarc.com
📊 DNS lookups: 1/10

DMARC Record

✗ Missing

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

DKIM Selectors

✗ None detected

No 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

5 records
  • MS=2DC69D7C39EF8C580F003453238DF1EE28D8721B
  • apple-domain-verification=LuLV6jZNKKho992t
  • MS=ms71698786
  • MS=ms95098138
  • SPFv=spf1 redirect=duellberg-konzentra.de.spf.hornetdmarc.com
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