rrg.com

Valid Email Server
Domain Lookup › rrg.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
rrg.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-23 11:09:31 UTC · ↺ Refresh

MX Hostnames

  • rrg-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 104.26.13.88 (no PTR)
  • 104.26.12.88 (no PTR)
  • 172.67.68.82
  • 2606:4700:20::681a:c58
  • 2606:4700:20::ac43:4452
  • 2606:4700:20::681a:d58

Mail Server IPs

  • 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
  • 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
  • 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
  • 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
  • 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com

SOA Record

Raw SOA mark.ns.cloudflare.com dns.cloudflare.com 2399372531 10000 2400 604800 1800
Primary NS (mname)
mark.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399372531
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

nadia.ns.cloudflare.com
mark.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
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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms32870851
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