Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zelltherapie-dortmund.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-31 16:16:46 UTC · ↺ Refresh
MX Hostnames
- mx04.netgroup.de
- mx02.netgroup.de
MX Priorities
- mx02.netgroup.de: 10
- mx04.netgroup.de: 20
A / AAAA Records
- 81.209.171.20 (no PTR)
Mail Server IPs
- 81.209.171.98 (no PTR)
- 81.209.171.101 (no PTR)
SOA Record
Raw SOA
ns01.netgroup.de dns.netgroup.de 2023042100 28800 3600 604800 86400
Primary NS (mname)
ns01.netgroup.de
Admin Email (rname)
dns@netgroup.de
Serial
2023042100
Refresh
28800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns02.netgroup.de
ns01.netgroup.de
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx ip4:81.209.171.97 all
📊 DNS lookups: 2/10
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 a mx ip4:81.209.171.97 all
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