cas-online.com

Valid Email Server
Domain Lookup › cas-online.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cas-online.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-19 06:29:57 UTC · ↺ Refresh

MX Hostnames

  • mailgw.cas-online.com
  • casmail.cas-online.com
  • mail.cas-online.com
  • est-mta.b2b-mail.net

MX Priorities

  • mailgw.cas-online.com: 3
  • mail.cas-online.com: 2
  • est-mta.b2b-mail.net: 10
  • casmail.cas-online.com: 1

A / AAAA Records

  • 64.253.185.121 ↩ wsip-64-253-185-121.om.om.cox.net

Mail Server IPs

  • 64.253.185.114 ↩ mail.nsightful.com
  • 209.222.66.255 ↩ est-mta.b2b-mail.net

SOA Record

Raw SOA ns1.cbsinetworks.com postmaster.cas-online.com 2023112901 1800 3600 604800 10800
Primary NS (mname)
ns1.cbsinetworks.com
Admin Email (rname)
postmaster@cas-online.com
Serial
2023112901
Refresh
1800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s

Nameservers (NS)

ns2.cbsinetworks.com
ns1.cbsinetworks.com
ns3.cbsinetworks.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:64.253.185.112/28 include:_spf.act-on.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1;p=none;rua=mailto:[email protected];pct=100;ri=86400;fo=1
⚠ 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 ip4:64.253.185.112/28 include:_spf.act-on.net -all
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