cdu-koenigswinter.de

Valid Email Server
Domain Lookup › cdu-koenigswinter.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cdu-koenigswinter.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-31 20:06:17 UTC · ↺ Refresh

MX Hostnames

  • mail1.ubgnet.de
  • mforward.dtag.de

MX Priorities

  • mforward.dtag.de: 20
  • mail1.ubgnet.de: 5

A / AAAA Records

  • 193.219.105.54 (no PTR)

Mail Server IPs

  • 194.25.242.123 ↩ mforward.dtag.de
  • 193.219.105.46 ↩ mail1.ubgnet.de

SOA Record

Raw SOA ns1.cdu.de root.ns1.cdu.de 2022061401 21600 1800 604800 3600
Primary NS (mname)
ns1.cdu.de
Admin Email (rname)
root@ns1.cdu.de
Serial
2022061401
Refresh
21600s
Retry
1800s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

pns.dtag.de
secondary006.dtag.net
ns1.cdu.de

SPF Record

✓ Strict (-all)
v=spf1 +ip4:193.219.105.0/24 include:inxserver.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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 +ip4:193.219.105.0/24 include:inxserver.com -all
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