limestone.edu

Valid Email Server
Domain Lookup › limestone.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
limestone.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-18 02:35:43 UTC · ↺ Refresh

MX Hostnames

  • limestone-edu.mail.eo.outlook.com

MX Priorities

  • limestone-edu.mail.eo.outlook.com: 10

A / AAAA Records

  • 23.185.0.2 (no PTR)

Mail Server IPs

  • 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
  • 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
  • 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
  • 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
  • 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
  • 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com

SOA Record

Raw SOA ns71.cloudns.net support.cloudns.net 2026030317 7200 1800 1209600 3600
Primary NS (mname)
ns71.cloudns.net
Admin Email (rname)
support@cloudns.net
Serial
2026030317
Refresh
7200s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns71.cloudns.net
ns73.cloudns.net
ns72.cloudns.com
ns74.cloudns.uk

SPF Record

✓ Strict (-all)
v=spf1 ip4:74.253.12.185/32 ip4:13.92.251.123/32 ip4:74.253.12.28/32 ip4:12.220.186.179/32 ip4:216.27.28.20/32 ip4:216.27.28.88/32 include:spf.protection.outlook.com include:sendgridmailer.samanage.com include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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 ip4:74.253.12.185/32 ip4:13.92.251.123/32 ip4:74.253.12.28/32 ip4:12.220.186.179/32 ip4:216.27.28.20/32 ip4:216.27.28.88/32 include:spf.protection.outlook.com include:sendgridmailer.samanage.com include:_spf.psm.knowbe4.com -all
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