claus-claussen.de

Valid Email Server
Domain Lookup › claus-claussen.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
claus-claussen.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-06 14:47:06 UTC · ↺ Refresh

MX Hostnames

  • buster.izwo.net
  • cab.izwo.net

MX Priorities

  • buster.izwo.net: 10
  • cab.izwo.net: 20

A / AAAA Records

  • 95.216.166.92 ↩ cab.izwo.net
  • 2a01:4f9:c010:22ed::1 ↩ cab.izwo.net

Mail Server IPs

  • 159.69.81.203 ↩ buster.izwo.net
  • 2a01:4f8:c2c:10de::1 ↩ buster.izwo.net
  • 95.216.166.92 ↩ cab.izwo.net
  • 2a01:4f9:c010:22ed::1 ↩ cab.izwo.net

SOA Record

Raw SOA buster.izwo.net hostmaster.izwo.net 2022121902 14400 3600 604800 300
Primary NS (mname)
buster.izwo.net
Admin Email (rname)
hostmaster@izwo.net
Serial
2022121902
Refresh
14400s
Retry
3600s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

cab.izwo.net
buster.izwo.net

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:88.99.13.156 ip6:2a01:4f8:1c17:5241::1 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

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

1 record
  • SPFv=spf1 mx ip4:88.99.13.156 ip6:2a01:4f8:1c17:5241::1 -all
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