castorpromotion.com

Valid Email Server
Domain Lookup › castorpromotion.com

Domain Overview

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

Checked via [email protected] · 2026-03-22 21:02:11 UTC · ↺ Refresh

MX Hostnames

  • mailsec.protonmail.ch
  • mail.protonmail.ch
  • mx2-us1.ppe-hosted.com
  • mx1-us1.ppe-hosted.com

MX Priorities

  • mx1-us1.ppe-hosted.com: 10
  • mx2-us1.ppe-hosted.com: 20
  • mail.protonmail.ch: 9
  • mailsec.protonmail.ch: 19

A / AAAA Records

  • 34.68.234.4

Mail Server IPs

  • 148.163.129.50 ↩ mx1-us1.ppe-hosted.com
  • 67.231.154.162 ↩ mx1-us1.ppe-hosted.com
  • 67.231.154.163 ↩ mx2-us1.ppe-hosted.com
  • 148.163.129.51 ↩ mx2-us1.ppe-hosted.com
  • 185.205.70.128 ↩ mail.protonmail.ch
  • 176.119.200.128 ↩ mail.protonmail.ch
  • 185.70.42.128 ↩ mail.protonmail.ch
  • 185.70.42.129 ↩ mailsec.protonmail.ch
  • 185.205.70.129 ↩ mailsec.protonmail.ch
  • 176.119.200.129 ↩ mailsec.protonmail.ch

SOA Record

Raw SOA ns51.domaincontrol.com dns.jomax.net 2024110605 28800 7200 604800 600
Primary NS (mname)
ns51.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024110605
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns51.domaincontrol.com
ns52.domaincontrol.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.protonmail.ch mx ~all
📊 DNS lookups: 2/10
~ 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

6 records
  • SPFv=spf1 include:_spf.protonmail.ch mx ~all
  • protonmail-verification=e6bc03908d3a12249382d91bce191d7ebd01e0ea
  • NETORG14879691.onmicrosoft.com
  • SPFv=spf1 a:dispatch-us.ppe-hosted.com include:secureserver.net -all
  • protonmail-verification=8fd5b0dc1d6248cc8e506e9375266075d1ce9dfe
  • SPFv=spf1 include:_spf.protonmail.ch ~all
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