Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ctk-gmbh.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 13:52:37 UTC · ↺ Refresh
MX Hostnames
- mx03.hornetsecurity.com
- mx02.hornetsecurity.com
- mx04.hornetsecurity.com
- mx01.hornetsecurity.com
MX Priorities
- mx04.hornetsecurity.com: 40
- mx01.hornetsecurity.com: 10
- mx03.hornetsecurity.com: 30
- mx02.hornetsecurity.com: 20
A / AAAA Records
- 212.223.1.78 ↩ srv01.15637.serviceprovider.de
Mail Server IPs
- 94.100.136.7 ↩ mx04.hornetsecurity.com
- 94.100.132.8 ↩ mx01.hornetsecurity.com
- 94.100.134.8 ↩ mx03.hornetsecurity.com
- 94.100.136.8 ↩ mx02.hornetsecurity.com
SOA Record
Raw SOA
ns11.nameserver.de dnsmaster.ns11.nameserver.de 2026022404 1440 600 86400 3600
Primary NS (mname)
ns11.nameserver.de
Admin Email (rname)
dnsmaster@ns11.nameserver.de
Serial
2026022404
Refresh
1440s
Retry
600s
Expire
86400s
Minimum TTL
3600s
Nameservers (NS)
ns12.nameserver.de
ns11.nameserver.de
SPF Record
✓ Soft Fail (~all)
v=spf1 redirect=ctk-gmbh.de.spf.hornetdmarc.com
📊 DNS lookups: 1/10
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; fo=1:0:d:s; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- SPFv=spf1 redirect=ctk-gmbh.de.spf.hornetdmarc.com
- 362633113eeb4ce18105cba10b3e1564
- sophos-domain-verification=2a22475334053f7c749972232a24302ea974cc90
- apple-domain-verification=Ro3QTl0w8LHM9iek
- 8doGDdTMChX9hjW5I7YewhjrfKAGOv55pHX1Ml5ymICxdO0oeEHwR3oGe6xSib58CJ9HzMc3Z+RpF+srzM2xmA==
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