colbyslawn.com

Valid Email Server
Domain Lookup › colbyslawn.com

Domain Overview

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

Checked via [email protected] · 2026-03-19 06:09:25 UTC · ↺ Refresh

MX Hostnames

  • colbyslawn-com.mail.protection.outlook.com

MX Priorities

  • colbyslawn-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.21.33.13 (no PTR)
  • 172.67.139.163 (no PTR)
  • 2606:4700:3037::6815:210d
  • 2606:4700:3033::ac43:8ba3

Mail Server IPs

  • 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
  • 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
  • 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com

SOA Record

Raw SOA joel.ns.cloudflare.com dns.cloudflare.com 2398066821 10000 2400 604800 1800
Primary NS (mname)
joel.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398066821
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

joel.ns.cloudflare.com
lana.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

✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms14144420
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