Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
rs.tus.ac.jp
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-21 20:52:36 UTC · ↺ Refresh
MX Hostnames
- rs-tus-ac-jp.mail.protection.outlook.com
MX Priorities
No priority data.
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
No IPs resolved.
SOA Record
No SOA record found.
Nameservers (NS)
dns-x.sinet.ad.jp
tusns.tus.ac.jp
tusns1.tus.ac.jp
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com +ip4:133.31.0.0/16 +ip4:210.166.194.0/24 +ip4:163.43.23.69 +ip4:163.43.23.68 +ip4:133.242.16.129 +ip4:59.106.227.100 +ip4:133.242.24.52 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- box-domain-verification=a3fd2b172be68010529c45dd8d320939e6c746eb8237f000340f54f94ce68992
- google-site-verification=m4aWqEJ1cqQWnHRxIHESDblWeWoV-QXy_Of2PnD0Ftk
- SPFv=spf1 include:spf.protection.outlook.com +ip4:133.31.0.0/16 +ip4:210.166.194.0/24 +ip4:163.43.23.69 +ip4:163.43.23.68 +ip4:133.242.16.129 +ip4:59.106.227.100 +ip4:133.242.24.52 -all
- MS=ms66053392
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 rs.tus.ac.jp
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits