Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
leiber-immobilien.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 20:05:23 UTC · ↺ Refresh
MX Hostnames
- kd-mail3.duf.de
- kdmail.regio-concept.info
- hmsmailbak.heise.de
MX Priorities
- kdmail.regio-concept.info: 10
- hmsmailbak.heise.de: 100
- kd-mail3.duf.de: 100
A / AAAA Records
- 193.99.144.221 (no PTR)
Mail Server IPs
- 193.99.144.222 (no PTR)
- 193.100.232.87 ↩ hmsmailbak.heise.de
- 2a00:e68:14:801:1462:97ff:fe63:5403 ↩ hmsmailbak.heise.de
- 192.166.167.141 ↩ kd-mail3.duf.de
- 2a00:e68:14:908::141 ↩ kd-mail3.duf.de
SOA Record
Raw SOA
ns.duf.de administrator.duf.de 2025041401 28800 900 1728000 3600
Primary NS (mname)
ns.duf.de
Admin Email (rname)
administrator@duf.de
Serial
2025041401
Refresh
28800s
Retry
900s
Expire
1728000s
Minimum TTL
3600s
Nameservers (NS)
dufdns.work.de
ns.duf.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a:mx3.fast-mailer.de ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo 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 a:mx3.fast-mailer.de ~all
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