Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
seijoishii.co.jp
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 10:00:22 UTC · ↺ Refresh
MX Hostnames
- smtp.google.com
MX Priorities
- smtp.google.com: 0
A / AAAA Records
- 23.227.38.65 ↩ myshopify.com
Mail Server IPs
- 192.178.218.27 ↩ yuiadtq-in-f27.1e100.net
- 142.251.179.26 ↩ pd-in-f26.1e100.net
- 142.251.179.27 ↩ pd-in-f27.1e100.net
- 64.233.180.27 ↩ on-in-f27.1e100.net
- 64.233.180.26 ↩ on-in-f26.1e100.net
- 2607:f8b0:4004:c21::1a ↩ pe-in-f26.1e100.net
- 2607:f8b0:4004:c25::1b ↩ yuiadtq-in-f27.1e100.net
- 2607:f8b0:4004:c1f::1b ↩ pd-in-f27.1e100.net
- 2607:f8b0:4004:c1f::1a ↩ pd-in-f26.1e100.net
SOA Record
Raw SOA
01.dnsv.jp hostmaster.dnsv.jp 1773211400 3600 900 604800 300
Primary NS (mname)
01.dnsv.jp
Admin Email (rname)
hostmaster@dnsv.jp
Serial
1773211400
Refresh
3600s
Retry
900s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
01.dnsv.jp
02.dnsv.jp
03.dnsv.jp
04.dnsv.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:124.38.54.116 ip4:124.38.54.124 ip4:203.137.164.115 ip4:54.199.130.107 ip4:13.112.218.189 ip4:13.114.133.237 include:smp.ne.jp include:mdsun.maildealer.jp include:_spf.google.com include:spf.mta.hdems.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
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
✓ 1 found
google._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:124.38.54.116 ip4:124.38.54.124 ip4:203.137.164.115 ip4:54.199.130.107 ip4:13.112.218.189 ip4:13.114.133.237 include:smp.ne.jp include:mdsun.maildealer.jp include:_spf.google.com include:spf.mta.hdems.com ~all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for seijoishii.co.jp
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits