Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
classnk.or.jp
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 12:25:12 UTC · ↺ Refresh
MX Hostnames
- classnk-or-jp.mail.protection.outlook.com
MX Priorities
No priority data.
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
No IPs resolved.
SOA Record
No SOA record found.
Nameservers (NS)
nkdns.classnk.or.jp
nkdns2.classnk.or.jp
nkdns3.classnk.or.jp
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com +ip4:202.219.44.22 +ip4:122.219.12.22 include:mail.zendesk.com +ip4:59.128.194.66 include:amazonses.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
1 record- SPFv=spf1 include:spf.protection.outlook.com +ip4:202.219.44.22 +ip4:122.219.12.22 include:mail.zendesk.com +ip4:59.128.194.66 include:amazonses.com -all
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