Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sheridan.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 13:02:41 UTC · ↺ Refresh
MX Hostnames
- sheridan-edu.mail.protection.outlook.com
MX Priorities
- sheridan-edu.mail.protection.outlook.com: 1
A / AAAA Records
- 134.209.41.86 ↩ sheridan.edu-new
Mail Server IPs
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:f90b:: ↩ mail-bn6pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f908::1 ↩ mail-bn1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
ns5.sheridan.edu mnaus\@sheridan.edu 2026022400 1200 120 1209600 30
Primary NS (mname)
ns5.sheridan.edu
Admin Email (rname)
mnaus\@sheridan@edu
Serial
2026022400
Refresh
1200s
Retry
120s
Expire
1209600s
Minimum TTL
30s
Nameservers (NS)
ns3.sheridan.edu
ns6.sheridan.edu
ns5.sheridan.edu
ns7.sheridan.edu
SPF Record
✓ Strict (-all)
v=spf1 a:mail.sheridan.edu include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected],mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
1 record- SPFv=spf1 a:mail.sheridan.edu include:spf.protection.outlook.com -all
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