Domain Overview
DNS: ✓ 2d ago
Checker: ✓ 2d ago
cpsb.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-19 09:09:16 UTC · ↺ Refresh
MX Hostnames
- cpsb-org.mail.protection.outlook.com
MX Priorities
- cpsb-org.mail.protection.outlook.com: 0
A / AAAA Records
- 104.17.71.73 (no PTR)
Mail Server IPs
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
- 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f902::2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
SOA Record
Raw SOA
edns.cpsb.org noc.cpsb.org 2023121554 7200 7200 1209600 7200
Primary NS (mname)
edns.cpsb.org
Admin Email (rname)
noc@cpsb.org
Serial
2023121554
Refresh
7200s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s
Nameservers (NS)
edns.cpsb.org
ednsa.cpsb.org
SPF Record
✓ Strict (-all)
v=spf1 ip4:38.28.92.0/26 ip4:168.245.100.239/32 ip4:167.89.118.48/32 include:spf.protection.outlook.com include:spf.schoolwires.net include:mh.blackboard.com include:_spf.bbnotify.net include:_spf.salesforce.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
3 records- dell-technologies-domain-verification=cpsb.org_62739845-cd79-41b9-802e-da3a950e076e_1732885893
- google-site-verification=0pHP0HbSZm5wmD9_RRSYo2opQSm-LsgG9fV39kJVuvc
- SPFv=spf1 ip4:38.28.92.0/26 ip4:168.245.100.239/32 ip4:167.89.118.48/32 include:spf.protection.outlook.com include:spf.schoolwires.net include:mh.blackboard.com include:_spf.bbnotify.net include:_spf.salesforce.com -all
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