cdonline.de

Valid Email Server
Domain Lookup › cdonline.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cdonline.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-26 07:41:19 UTC · ↺ Refresh

MX Hostnames

  • mx01.ionos.de
  • mx00.ionos.de

MX Priorities

  • mx01.ionos.de: 20
  • mx00.ionos.de: 10

A / AAAA Records

  • 217.160.0.244 ↩ 217-160-0-244.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::25b ↩ 2001-08d8-100f-f000-0000-0000-0000-025b.elastic-ssl.ui-r.com

Mail Server IPs

  • 217.72.192.67 ↩ mx01.kundenserver.de
  • 212.227.15.41 ↩ mx00.kundenserver.de

SOA Record

Raw SOA ns1029.ui-dns.biz hostmaster.1und1.com 2017060270 28800 7200 604800 600
Primary NS (mname)
ns1029.ui-dns.biz
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060270
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns1067.ui-dns.org
ns1109.ui-dns.com
ns1091.ui-dns.de
ns1029.ui-dns.biz

SPF Record

✓ Soft Fail (~all)
v=spf1 a mx include:_spf.perfora.net include:_spf.kundenserver.de include:_spf-eu.ionos.com include:spf.crsend.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate 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

3 records
  • google-site-verification=C7_U1Ti0McK4jFWaAS7e_QdVUXXM5J0SNVJSZ0QhRns
  • SPFv=spf1 a mx include:_spf.perfora.net include:_spf.kundenserver.de include:_spf-eu.ionos.com include:spf.crsend.com ~all
  • MS=ms14874035
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