Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cgn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-03 16:06:58 UTC · ↺ Refresh
MX Hostnames
- mail2.koeln-bonn-airport.de
- mail1.koeln-bonn-airport.de
MX Priorities
- mail1.koeln-bonn-airport.de: 20
- mail2.koeln-bonn-airport.de: 20
A / AAAA Records
- 82.165.182.195 ↩ cgn-nebenan.de
Mail Server IPs
- 194.110.25.161 ↩ mail1.koeln-bonn-airport.de
- 194.110.25.162 ↩ mail2.koeln-bonn-airport.de
SOA Record
Raw SOA
dns3.netcologne.de hostmaster.netcologne.de 2025111806 300 3600 2419200 900
Primary NS (mname)
dns3.netcologne.de
Admin Email (rname)
hostmaster@netcologne.de
Serial
2025111806
Refresh
300s
Retry
3600s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
dns5.netcologne.de
dns4.netcologne.de
dns3.netcologne.de
SPF Record
✓ Strict (-all)
v=spf1 a mx a:cgn-nebenan.de include:spf.protection.outlook.com include:_spf.cmail.ondemand.com ip4:194.110.25.161 ip4:194.110.25.162 ip4:194.110.25.163 ip4:52.157.149.216 ip4:35.242.247.107 ip4:34.107.8.58 ip4:34.107.88.2 ip4:35.246.224.53 -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;ruf=mailto:[email protected];sp=quarantine;fo=0:d:s;adkim=r;aspf=r
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 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
7 records- _telesec-domain-validation=2025-05-16_YNh4zqKOUNsYcebxzQ4StynB5mxGcvc5H5UO78cDTkRBAbyP6B
- MS=ms97867204
- d365mktkey=U0exut6136e1VbRxmUZPpQunpzix2wxVUwx8RAqVFyox
- SPFv=spf1 a mx a:cgn-nebenan.de include:spf.protection.outlook.com include:_spf.cmail.ondemand.com ip4:194.110.25.161 ip4:194.110.25.162 ip4:194.110.25.163 ip4:52.157.149.216 ip4:35.242.247.107 ip4:34.107.8.58 ip4:34.107.88.2 ip4:35.246.224.53 -all
- facebook-domain-verification=o9540re3kmi7lp55npp5y3f6novxh4
- apple-domain-verification=j063FC7fA3jwDgBv
- knowbe4-site-verification=ffa208c75e3fe1e338916ea74c6dc4a6
Full email verification for cgn.de
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