Domain Overview
DNS: ✓ 8h ago
Checker: ✓ 8h ago
jtbgmt.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-07-02 10:40:20 UTC · ↺ Refresh
MX Hostnames
- jtbgmt.com
MX Priorities
- jtbgmt.com: 10
A / AAAA Records
- 20.44.184.238 (no PTR)
Mail Server IPs
- 20.44.184.238 (no PTR)
SOA Record
Raw SOA
ns000.d-53.net dns-managers.iij.ad.jp 345 3600 600 604800 900
Primary NS (mname)
ns000.d-53.net
Admin Email (rname)
dns-managers@iij.ad.jp
Serial
345
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
ns020-kdq4kpaib1hd26lk.k.d-53.jp
ns020-kdq4kpaib1hd26lk.k.d-53.org
ns020-kdq4kpaib1hd26lk.k.d-53.info
SPF Record
✓ Strict (-all)
v=spf1 include:spf.ecbeing.co.jp -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
4 records- 29phahfroj8t4fs25tbpm47qvr
- nc7srhlhj4nldj7hib820b026g
- SPFv=spf1 include:spf.ecbeing.co.jp -all
- pardot818893=28630827c750e49936ec2c9203cfeac7fdb9b4ff8bae64260b170ec3715c3ca0
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