Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
drchristopherchang.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 07:58:37 UTC · ↺ Refresh
MX Hostnames
- drchristopherchang-com.mail.protection.outlook.com
MX Priorities
- drchristopherchang-com.mail.protection.outlook.com: 10
A / AAAA Records
- 104.21.45.109 (no PTR)
- 172.67.213.113 (no PTR)
- 2606:4700:3033::6815:2d6d
- 2606:4700:3034::ac43:d571
Mail Server IPs
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
SOA Record
Raw SOA
gene.ns.cloudflare.com dns.cloudflare.com 2395608443 10000 2400 604800 1800
Primary NS (mname)
gene.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2395608443
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
gene.ns.cloudflare.com
lynn.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
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
6 records- qc6demadvdh5h01h8l0gcn2oai
- SPFv=spf1 include:spf.protection.outlook.com -all
- v=verifydomain MS=8101818
- IGDKPQJSJCRPBE6FRURT45S7H
- brevo-code:7d903dc698cec4c94ce8afa6ed0d26b7
- google-site-verification=ECY7DwVR8_ePhRGLlf9fD_B4w_o6jLwJl3-3uE7ZQMc
Full email verification for drchristopherchang.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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