yahoo.co.jp

Valid Email Server
Domain Lookup › yahoo.co.jp

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
yahoo.co.jp
Yes
✓ Yes
Yahoo
No
Yes
⚠ Yes
No
No

Checked via [email protected] · 2026-03-23 10:35:44 UTC · ↺ Refresh

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MX Hostnames

  • mx2.mail.yahoo.co.jp
  • mx1.mail.yahoo.co.jp
  • mx3.mail.yahoo.co.jp
  • mx5.mail.yahoo.co.jp

MX Priorities

  • mx2.mail.yahoo.co.jp: 10
  • mx5.mail.yahoo.co.jp: 10
  • mx1.mail.yahoo.co.jp: 10
  • mx3.mail.yahoo.co.jp: 10

A / AAAA Records

  • 183.79.219.124
  • 124.83.184.124
  • 182.22.28.252
  • 183.79.249.252
  • 124.83.185.124
  • 182.22.25.252
  • 182.22.16.123
  • 182.22.24.252
  • 182.22.25.124
  • 124.83.185.252
  • 183.79.250.251
  • 182.22.16.251
  • 183.79.249.124
  • 183.79.219.252
  • 182.22.31.124
  • 182.22.24.124
  • 124.83.184.252
  • 182.22.31.252

Mail Server IPs

  • 203.216.254.88 ↩ mtagwv2-0004.mail.vip.otm.ynwl.yahoo.co.jp
  • 183.79.221.217 ↩ mtagwv2-2003.mail.vip.snz.ynwl.yahoo.co.jp
  • 203.216.254.89 ↩ mtagwv2-0003.mail.vip.otm.ynwl.yahoo.co.jp
  • 183.79.221.216 ↩ mtagwv2-2004.mail.vip.snz.ynwl.yahoo.co.jp
  • 183.79.221.213 ↩ mtagwv2-2007.mail.vip.snz.ynwl.yahoo.co.jp
  • 203.216.254.85 ↩ mtagwv2-0007.mail.vip.otm.ynwl.yahoo.co.jp
  • 203.216.254.84 ↩ mtagwv2-0008.mail.vip.otm.ynwl.yahoo.co.jp
  • 183.79.221.212 ↩ mtagwv2-2008.mail.vip.snz.ynwl.yahoo.co.jp
  • 203.216.254.90 ↩ mtagwv2-0002.mail.vip.otm.ynwl.yahoo.co.jp
  • 183.79.221.218 ↩ mtagwv2-2002.mail.vip.snz.ynwl.yahoo.co.jp
  • 183.79.221.219
  • 203.216.254.91
  • 203.216.254.86
  • 183.79.221.215
  • 183.79.221.214
  • 203.216.254.87

SOA Record

Raw SOA yahoo.co.jp postmaster.yahoo.co.jp 2603230008 1800 900 86400 900
Primary NS (mname)
yahoo.co.jp
Admin Email (rname)
postmaster@yahoo.co.jp
Serial
2603230008
Refresh
1800s
Retry
900s
Expire
86400s
Minimum TTL
900s

Nameservers (NS)

ns11.yahoo.co.jp
ns02.yahoo.co.jp
ns01.yahoo.co.jp
ns12.yahoo.co.jp

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.yahoo.co.jp ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No 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

2 records
  • google-site-verification=GvbYgNin-mY73VbS4IJK2D8nI3tHEf2NpRdy76VYqBU
  • SPFv=spf1 include:spf.yahoo.co.jp ~all
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