Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
xserver.co.jp
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 05:05:18 UTC · ↺ Refresh
MX Hostnames
- mail.xserver.co.jp
MX Priorities
- mail.xserver.co.jp: 0
A / AAAA Records
- 183.181.99.176 ↩ sv1002.xbiz.ne.jp
Mail Server IPs
- 202.226.36.233 ↩ dsv0.sixcore.ne.jp
SOA Record
Raw SOA
ns1.xbiz.ne.jp root.xbiz.ne.jp 0 10800 3600 604800 3600
Primary NS (mname)
ns1.xbiz.ne.jp
Admin Email (rname)
root@xbiz.ne.jp
Serial
0
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns3.xbiz.ne.jp
ns2.xbiz.ne.jp
ns1.xbiz.ne.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 +ip4:202.226.36.233 +ip4:202.226.36.238 +ip4:202.226.36.251 +ip4:183.76.180.34 +ip4:183.181.92.0/24 +ip4:202.226.37.0/24 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate 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
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- google-site-verification=dqVctHCQ_HeFyZ-2qJH-q-sy4BWsPwtooQyPQuzFEC0
- SPFv=spf1 +ip4:202.226.36.233 +ip4:202.226.36.238 +ip4:202.226.36.251 +ip4:183.76.180.34 +ip4:183.181.92.0/24 +ip4:202.226.37.0/24 ~all
- google-site-verification=IsHrBKxdyjynUQQIrw-s0tnX2Krbl63cyy6zdDZRAAM
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