Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ck-personaltrainer.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 09:31:35 UTC · ↺ Refresh
MX Hostnames
- mxext3.mailbox.org
- mxext2.mailbox.org
- mxext1.mailbox.org
MX Priorities
- mxext1.mailbox.org: 10
- mxext3.mailbox.org: 30
- mxext2.mailbox.org: 20
A / AAAA Records
- 81.3.5.57 (no PTR)
Mail Server IPs
- 80.241.60.212 ↩ mx1.mailbox.org
- 2001:67c:2050:104::1:25:1 ↩ mx1.mailbox.org
- 80.241.60.216 ↩ mx3.mailbox.org
- 2001:67c:2050:104::3:25:1 ↩ mx3.mailbox.org
- 80.241.60.215 ↩ mx2.mailbox.org
- 2001:67c:2050:104::2:25:1 ↩ mx2.mailbox.org
SOA Record
Raw SOA
root-dns.netcup.net dnsadmin.netcup.net 2022042204 21600 3600 259200 300
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2022042204
Refresh
21600s
Retry
3600s
Expire
259200s
Minimum TTL
300s
Nameservers (NS)
third-dns.netcup.net
second-dns.netcup.net
root-dns.netcup.net
SPF Record
✓ Strict (-all)
v=spf1 include:mailbox.org -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
1 record- SPFv=spf1 include:mailbox.org -all
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