Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ruk.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 07:27:46 UTC · ↺ Refresh
MX Hostnames
- mail.koeln-marathon.de
MX Priorities
- mail.koeln-marathon.de: 10
A / AAAA Records
- 46.4.144.219 ↩ plesk.treck.de
Mail Server IPs
- 185.105.252.226 ↩ mail.koeln-marathon.de
- 2a02:248:101:62::14e7 ↩ mail.koeln-marathon.de
SOA Record
Raw SOA
ns3.fcio.net support.flyingcircus.io 1 10800 3600 604800 3600
Primary NS (mname)
ns3.fcio.net
Admin Email (rname)
support@flyingcircus.io
Serial
1
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns4.fcio.net
ns3.fcio.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:185.105.252.226 ip6:2a02:248:101:62::14e7 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate 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
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:185.105.252.226 ip6:2a02:248:101:62::14e7 ~all
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