drmarkchung.com

Valid Email Server
Domain Lookup › drmarkchung.com

Domain Overview

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

Checked via [email protected] · 2026-03-21 10:10:18 UTC · ↺ Refresh

MX Hostnames

  • mail.drmarkchung.com
  • drmarkchung-com.mail.protection.outlook.com

MX Priorities

  • drmarkchung-com.mail.protection.outlook.com: 0
  • mail.drmarkchung.com: 10

A / AAAA Records

  • 104.21.49.224 (no PTR)
  • 172.67.152.254
  • 2606:4700:3035::ac43:98fe
  • 2606:4700:3032::6815:31e0

Mail Server IPs

  • 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
  • 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
  • 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
  • 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
  • 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
  • 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:f90f:: ↩ mail-sa9pr04cu00100.inbound.protection.outlook.com
  • 70.40.218.218 ↩ 70-40-218-218.unifiedlayer.com

SOA Record

Raw SOA alla.ns.cloudflare.com dns.cloudflare.com 2397850549 10000 2400 604800 1800
Primary NS (mname)
alla.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397850549
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

hugh.ns.cloudflare.com
alla.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: 216 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=ms20495500
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