Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
course5i.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 23:38:38 UTC · ↺ Refresh
MX Hostnames
- course5i-com.mail.protection.outlook.com
MX Priorities
- course5i-com.mail.protection.outlook.com: 0
A / AAAA Records
- 67.205.44.127 ↩ vps21976.dreamhostps.com
Mail Server IPs
- 52.101.144.0 ↩ mail-ma0pr01cu01000.inbound.protection.outlook.com
- 52.101.145.2 ↩ mail-pnypr01cu00202.inbound.protection.outlook.com
- 52.101.144.3 ↩ mail-ma0pr01cu01103.inbound.protection.outlook.com
- 52.101.145.0 ↩ mail-pnzpr01cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns59.domaincontrol.com dns.jomax.net 2026031800 28800 7200 604800 600
Primary NS (mname)
ns59.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026031800
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns60.domaincontrol.com
ns59.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:amazonses.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- SPFv=spf1 include:spf.protection.outlook.com include:amazonses.com -all
- apple-domain-verification=bI8oHq0RrvCNd9xA
- openai-domain-verification=dv-T7fhqtuhVm0DiYmypnzuYCXV
- google-site-verification=I2n3u70dPIFW-xLhhuBAhkU9ZLI12umqEi4H4OnLybE
- cisco-ci-domain-verification=7217db1d96b0cef73e183eb439d2004c5782bc7ed7c0ac5e1c7ab26a901049e2
Full email verification for course5i.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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