Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cb-tec.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 10:19:11 UTC · ↺ Refresh
MX Hostnames
- cbtec-de0e.mail.protection.outlook.com
MX Priorities
- cbtec-de0e.mail.protection.outlook.com: 10
A / AAAA Records
- 109.71.74.50 ↩ srv-a-go.c-2512.maxcluster.net
- 2a05:cc00::74:50:10 ↩ srv-a-go.c-2512.maxcluster.net
Mail Server IPs
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
- 2a01:111:f403:ca09::7 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
SOA Record
Raw SOA
ns.udag.de hostmaster.united-domains.de 2024092061 10800 3600 604800 3600
Primary NS (mname)
ns.udag.de
Admin Email (rname)
hostmaster@united-domains.de
Serial
2024092061
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns.udag.org
ns.udag.de
ns.udag.net
SPF Record
✓ Strict (-all)
v=spf1 a include:spf.protection.outlook.com include:spf.crsend.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → 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
3 records- google-site-verification=f-yfNmER35E3hEwje8VpSeMJOHUxpdulbRxhmorS1SE
- SPFv=spf1 a include:spf.protection.outlook.com include:spf.crsend.com -all
- D-TRUST=NHN6QKV8FILU6YGZPVQQUM4
Full email verification for cb-tec.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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