Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
chesapeake.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 03:35:27 UTC · ↺ Refresh
MX Hostnames
- chesapeake-edu.mail.protection.outlook.com
MX Priorities
- chesapeake-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 141.193.213.21 (no PTR)
- 141.193.213.20 (no PTR)
Mail Server IPs
- 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
dns0.zoneedit.com zone.zoneedit.com 1771514444 3600 600 604800 300
Primary NS (mname)
dns0.zoneedit.com
Admin Email (rname)
zone@zoneedit.com
Serial
1771514444
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
dns3.zoneedit.com
dns1.zoneedit.com
dns2.zoneedit.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:sparkpostmail.com include:mailgun.org ip4:198.175.248.15/32 include:_spf.psm.knowbe4.com include:_spf.samanage.com include:sendgrid.net include:outboundmail.blackbaud.net include:outboundmail.convio.net -all
📊 DNS lookups: 9/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=10;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 10% of failing messages only
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
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 include:servers.mcsv.net include:sparkpostmail.com include:mailgun.org ip4:198.175.248.15/32 include:_spf.psm.knowbe4.com include:_spf.samanage.com include:sendgrid.net include:outboundmail.blackbaud.net include:outboundmail.convio.net -all
- DCV [email protected]
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