ceibs.edu

Valid Email Server
Domain Lookup › ceibs.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
ceibs.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-31 08:18:40 UTC · ↺ Refresh

MX Hostnames

  • categorizer0.ceibs.edu
  • categorizer.ceibs.edu

MX Priorities

  • categorizer.ceibs.edu: 20
  • categorizer0.ceibs.edu: 10

A / AAAA Records

  • 116.246.20.232 ↩ ceibs.edu

Mail Server IPs

  • 116.246.20.209 ↩ ceibs.edu
  • 116.246.20.196 ↩ ceibs.edu

SOA Record

Raw SOA vip3.alidns.com hostmaster.hichina.com 2025121112 3600 1200 86400 600
Primary NS (mname)
vip3.alidns.com
Admin Email (rname)
hostmaster@hichina.com
Serial
2025121112
Refresh
3600s
Retry
1200s
Expire
86400s
Minimum TTL
600s

Nameservers (NS)

vip4.alidns.com
vip3.alidns.com

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:116.246.29.118 ip4:116.246.20.216 ip4:116.246.20.217 ip4:116.246.20.219 ip4:116.246.20.220 include:spf.protection.outlook.com include:spf.263.net ~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

✓ 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

7 records
  • cisco-ci-domain-verification=5de1c98bedc4373a7c290915290dacaa4cb6a4c1b7136f72db4de7d9f022dd9f
  • SPFv=spf1 ip4:116.246.29.118 ip4:116.246.20.216 ip4:116.246.20.217 ip4:116.246.20.219 ip4:116.246.20.220 include:spf.protection.outlook.com include:spf.263.net ~all
  • Foxit-domain-verification=c3ec18664980df34dc9998dbe5bab931
  • MS=433CE8124F574F7139A4D080329B98C871365292
  • MS=ms57355831
  • U+9PnIAAewAZ05mYneEmhnbqHKXq2j/bdw9bRBAcyBXXcHFriRPzsdE0d2tAOpX6C92pHGJeMdxSMHyBBkjjjA==
  • apple-domain-verification=iuraxGXPTGeeNDHg
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