Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tsukishima.co.jp
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 05:10:08 UTC · ↺ Refresh
MX Hostnames
- mxin1.airnet.ne.jp
- mxin2.airnet.ne.jp
MX Priorities
- mxin2.airnet.ne.jp: 10
- mxin1.airnet.ne.jp: 10
A / AAAA Records
- 122.17.147.203 ↩ c15e35gn.mwprem.net
Mail Server IPs
- 210.166.71.21 ↩ mxin2-02.airnet.ne.jp
- 210.159.71.91 ↩ mxin2-01.airnet.ne.jp
- 210.159.71.90 ↩ mxin1-01.airnet.ne.jp
- 210.166.71.20 ↩ mxin1-02.airnet.ne.jp
SOA Record
Raw SOA
dns1.air.ne.jp support.air.ad.jp 2025101206 3600 1800 2592000 3600
Primary NS (mname)
dns1.air.ne.jp
Admin Email (rname)
support@air.ad.jp
Serial
2025101206
Refresh
3600s
Retry
1800s
Expire
2592000s
Minimum TTL
3600s
Nameservers (NS)
dns4.air.ne.jp
dns1.air.ne.jp
dns2.air.ne.jp
dns3.air.ne.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 +a include:_spf.mwprem.net include:_spf.bownow.jp ip4:210.166.79.74 ip4:210.166.79.75 ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- apple-domain-verification=eiU4WBk6pD1EdJjS
- SPFv=spf1 +a include:_spf.mwprem.net include:_spf.bownow.jp ip4:210.166.79.74 ip4:210.166.79.75 ~all
- MS=0BB16CC1446ED76A5BBB0FF7EEF2D64B6AEC0ED5
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