ringdu.com

Valid Email Server
Domain Lookup › ringdu.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
ringdu.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 15:54:33 UTC · ↺ Refresh

MX Hostnames

  • mx1-us1.ppe-hosted.com
  • mx2-us1.ppe-hosted.com

MX Priorities

  • mx1-us1.ppe-hosted.com: 10
  • mx2-us1.ppe-hosted.com: 20

A / AAAA Records

  • 199.16.172.123 (no PTR)
  • 199.16.173.51 (no PTR)

Mail Server IPs

  • 148.163.129.50 ↩ mx1-us1.ppe-hosted.com
  • 67.231.154.162 ↩ mx1-us1.ppe-hosted.com
  • 148.163.129.51 ↩ mx2-us1.ppe-hosted.com
  • 67.231.154.163 ↩ mx2-us1.ppe-hosted.com

SOA Record

Raw SOA ns15.worldnic.com namehost.worldnic.com 125091115 10800 3600 604800 3600
Primary NS (mname)
ns15.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125091115
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns16.worldnic.com
ns15.worldnic.com

SPF Record

✓ Soft Fail (~all)
v=spf1 mx a a:dispatch-us.ppe-hosted.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

8 records
  • duo_sso_verification=2xwJB9HRcZTIMDgncRjBFuZqoRNVpBprTvTVcZIRqcYwxsH6Vx4RFzfpngdY5YWd
  • SPFv=spf1 mx a a:dispatch-us.ppe-hosted.com include:spf.protection.outlook.com ~all
  • MS=ms33224349
  • have-i-been-pwned-verification=720ada1d6bc9ea2e19e05e379a124415
  • ilaqp7p9lgkk2398tl06b2dnvn
  • autodesk-domain-verification=yHCNOuaNT8j6R_ij-R6b
  • google-site-verification=E9qcJ0VuLwXFG-GXsuGhTqnPpEcIyeWS0FqAbg7-2AE
  • apple-domain-verification=COvDY7sQfc5kObYS
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