Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
usability.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 05:57:51 UTC · ↺ Refresh
MX Hostnames
- usability-de.mail.protection.outlook.com
MX Priorities
- usability-de.mail.protection.outlook.com: 0
A / AAAA Records
- 92.205.192.3 ↩ mc20992.ispgateway.de
- 2a00:116a:101:a890:: ↩ mc20992.ispgateway.de
Mail Server IPs
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
- 2a01:111:f403:ca04::d ↩ mail-db6pr03cu00105.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
ns81.domaincontrol.com dns.jomax.net 2026030400 28800 7200 604800 600
Primary NS (mname)
ns81.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026030400
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns82.domaincontrol.com
ns81.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:ispgateway.de include:spf.brevo.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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- google-site-verification=TYPKiZa7GKUdhLclmtQAGxrY3o97TaNQKuaqczoIM2g
- apple-domain-verification=aChqNfI2wJ0q0N1e
- SPFv=spf1 include:spf.protection.outlook.com include:ispgateway.de include:spf.brevo.com -all
- brevo-code:53e0697f8554c9435236e334eb37a66c
Full email verification for usability.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits