Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
jsb-tech.co.jp
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-06-03 09:47:38 UTC · ↺ Refresh
MX Hostnames
- mx.jsb-tech.co.jp
MX Priorities
- mx.jsb-tech.co.jp: 100
A / AAAA Records
- 153.122.205.50 (no PTR)
Mail Server IPs
- 153.122.206.94 (no PTR)
SOA Record
Raw SOA
ns1.rental-sv2.jp root.rental-sv2.jp 2698699574 10800 1800 259200 0
Primary NS (mname)
ns1.rental-sv2.jp
Admin Email (rname)
root@rental-sv2.jp
Serial
2698699574
Refresh
10800s
Retry
1800s
Expire
259200s
Minimum TTL
0s
Nameservers (NS)
ns2.rental-sv2.jp
ns1.rental-sv2.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.shared-server.net ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:_spf.shared-server.net ~all
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