Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gdb.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-03 09:46:59 UTC · ↺ Refresh
MX Hostnames
- gdb-de.mail.protection.outlook.com
MX Priorities
- gdb-de.mail.protection.outlook.com: 0
A / AAAA Records
- 31.220.123.88 ↩ r13938.agenturserver.it
Mail Server IPs
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 52.101.73.4 ↩ mail-am0pr83cu00404.inbound.protection.outlook.com
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
- 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
dns11.netcologne.de hostmaster.netcologne.de 2026032404 10800 3600 3600000 3600
Primary NS (mname)
dns11.netcologne.de
Admin Email (rname)
hostmaster@netcologne.de
Serial
2026032404
Refresh
10800s
Retry
3600s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
dns12.netcologne.de
dns13.netcologne.de
dns14.netcologne.de
dns11.netcologne.de
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:78.35.22.187 include:spf.protection.outlook.com include:agenturserver.de include:spf-westeu.emailsignatures365.com include:spf.smtp2go.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
4 records- SPFv=spf1 a mx ip4:78.35.22.187 include:spf.protection.outlook.com include:agenturserver.de include:spf-westeu.emailsignatures365.com include:spf.smtp2go.com -all
- google-site-verification=2vfxK4SKid588kV3_AIZGl1p3XigOfcmaD0KwH6BwsA
- sophos-domain-verification=36f5a388d87de8fe8391c5f71105f1944896f2d6b08b37be988ba247320cb51d
- KAUf7hWPTRdBVUY0F0hEbMYLa2jplhbMM/0Fibb+rpcs8e73BWReVHc4d0wvjTQceTIn+2yqqRmcAhHWowaFvQ==
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