Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mmec.co.jp
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 10:54:06 UTC · ↺ Refresh
MX Hostnames
- mmec.co.jp
MX Priorities
- mmec.co.jp: 10
A / AAAA Records
- 163.43.80.85 ↩ www3775.sakura.ne.jp
Mail Server IPs
- 163.43.80.85 ↩ www3775.sakura.ne.jp
SOA Record
Raw SOA
master.dns.ne.jp tech.sakura.ad.jp 2024030801 3600 900 3600000 3600
Primary NS (mname)
master.dns.ne.jp
Admin Email (rname)
tech@sakura.ad.jp
Serial
2024030801
Refresh
3600s
Retry
900s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
ns2.dns.ne.jp
ns1.dns.ne.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 a:www3775.sakura.ne.jp mx ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; aspf=r; adkim=r; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
1 record- SPFv=spf1 a:www3775.sakura.ne.jp mx ~all
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