ybb.ne.jp

Valid Email Server
Domain Lookup › ybb.ne.jp

Domain Overview

DNS: ✓ 23h ago Checker: ✓ 23h ago
ybb.ne.jp
Yes
✓ Yes
Yahoo
No
Yes
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-20 12:54:24 UTC · ↺ Refresh

MX Hostnames

  • ybbmx1.mail.yahoo.co.jp

MX Priorities

  • ybbmx1.mail.yahoo.co.jp: 10

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 202.93.77.237 ↩ ybbmtagw0001.mail.vip.otm.ynwp.yahoo.co.jp
  • 202.93.78.238 ↩ ybbmtagw0002.mail.vip.otm.ynwp.yahoo.co.jp
  • 124.83.237.240 ↩ ybbmtagw2002.mail.vip.snz.ynwp.yahoo.co.jp
  • 124.83.237.241 ↩ ybbmtagw2001.mail.vip.snz.ynwp.yahoo.co.jp

SOA Record

Raw SOA ybb.ne.jp postmaster.ybb.ne.jp 2506240000 1800 900 1209600 900
Primary NS (mname)
ybb.ne.jp
Admin Email (rname)
postmaster@ybb.ne.jp
Serial
2506240000
Refresh
1800s
Retry
900s
Expire
1209600s
Minimum TTL
900s

Nameservers (NS)

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

SPF Record

✓ Soft Fail (~all)
v=spf1 redirect=yahoo.co.jp
📊 DNS lookups: 1/10

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 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

1 record
  • SPFv=spf1 redirect=yahoo.co.jp
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