Domain Overview
DNS: ✓ just now
Checker: ✓ just now
gfo-kliniken-troisdorf.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-06-01 20:38:04 UTC · ↺ Refresh
MX Hostnames
- mx0.gfo-online.de
MX Priorities
- mx0.gfo-online.de: 10
A / AAAA Records
- 23.88.92.128 ↩ dedi7177.your-server.de
Mail Server IPs
- 45.85.200.25 ↩ mx0.gfo-online.de
SOA Record
Raw SOA
dns11.netcologne.de hostmaster.netcologne.de 2026031003 28800 7200 604800 3600
Primary NS (mname)
dns11.netcologne.de
Admin Email (rname)
hostmaster@netcologne.de
Serial
2026031003
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns11.netcologne.de
dns13.netcologne.de
dns12.netcologne.de
dns14.netcologne.de
SPF Record
✓ Strict (-all)
v=spf1 include:gfo-online.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
2 records- SPFv=spf1 include:gfo-online.de -all
- swisssign-check=8hOKP10m_izsubpRKeb5z032JZk
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