Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
csustan.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 21:12:43 UTC · ↺ Refresh
MX Hostnames
- csustan-edu.mail.protection.outlook.com
MX Priorities
- csustan-edu.mail.protection.outlook.com: 10
A / AAAA Records
- 151.101.42.133 (no PTR)
Mail Server IPs
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.41.24 ↩ mail-sj0pr03cu01600.inbound.protection.outlook.com
- 52.101.41.58 ↩ mail-sj0pr02cu00102.inbound.protection.outlook.com
- 52.101.40.4 ↩ mail-cy5pr03cu00204.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-09.azure-dns.com rinman.csustan.edu 861 600 300 86400 300
Primary NS (mname)
ns1-09.azure-dns.com
Admin Email (rname)
rinman@csustan.edu
Serial
861
Refresh
600s
Retry
300s
Expire
86400s
Minimum TTL
300s
Nameservers (NS)
ns1-09.azure-dns.com
ns2-09.azure-dns.net
ns3-09.azure-dns.org
ns4-09.azure-dns.info
SPF Record
✓ Strict (-all)
v=spf1 ip4:69.48.215.8 ip4:69.48.215.55 include:spf.protection.outlook.com include:ironportspf.calstate.edu include:%{l}._spf.csustan.edu -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 6 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 ip4:69.48.215.8 ip4:69.48.215.55 include:spf.protection.outlook.com include:ironportspf.calstate.edu include:%{l}._spf.csustan.edu -all
- jamf-site-verification=ZSo9ksYOujjiR5xFGZ8wvg
Full email verification for csustan.edu
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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