colliersimon.com

Valid Email Server
Domain Lookup › colliersimon.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
colliersimon.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-25 10:40:07 UTC · ↺ Refresh

MX Hostnames

  • colliersimon-com.mail.protection.outlook.com

MX Priorities

  • colliersimon-com.mail.protection.outlook.com: 10

A / AAAA Records

  • 18.211.166.153 ↩ ec2-18-211-166-153.compute-1.amazonaws.com
  • 34.202.203.47 ↩ ec2-34-202-203-47.compute-1.amazonaws.com
  • 54.243.86.28

Mail Server IPs

  • 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
  • 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
  • 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
  • 52.101.9.17 (no PTR)
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c802:: ↩ mail-cy4pr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA sri.ns.cloudflare.com dns.cloudflare.com 2398643307 10000 2400 604800 1800
Primary NS (mname)
sri.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398643307
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

uma.ns.cloudflare.com
sri.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
  • 6qp8gq1r159cdq4nehe73qquv
  • MS=ms78324642
  • dsumchsqa4hcunmdo33nm9c67d
  • google-site-verification=DuR3DwvkvUVYJP2l04Q02gSTkxawQkuJonvhTQMpfAU
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • 1fgfcbmlol3grn0o431b0l54rk
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