Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ceres.k12.ca.us
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 06:00:00 UTC · ↺ Refresh
MX Hostnames
- ceres-k12-ca-us.mail.protection.outlook.com
MX Priorities
- ceres-k12-ca-us.mail.protection.outlook.com: 0
A / AAAA Records
- 34.238.178.141 ↩ ec2-34-238-178-141.compute-1.amazonaws.com
Mail Server IPs
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f804::1 ↩ mail-co1pr05cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
ns10.digicertdns.com dns.digicertdns.com 2009010210 43200 3600 1209600 180
Primary NS (mname)
ns10.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009010210
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns10.digicertdns.com
ns15.digicertdns.net
ns14.digicertdns.net
ns13.digicertdns.net
ns12.digicertdns.com
ns11.digicertdns.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:47.45.44.33 include:spf.protection.outlook.com include:spfa.cpmails.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._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
10 records- brevo-code:d94483b1e0cdafe04f3659e6470a5594
- SPFv=spf1 a mx ip4:47.45.44.33 include:spf.protection.outlook.com include:spfa.cpmails.com -all
- apple-domain-verification=gRb0sRMq695tyenZ
- MS=ms30735637
- sophos-domain-verification=98efeecfae67fa72cb1eb81a62419e4401f12015
- apple-domain-verification=pA2Sadfv6qydNxC9
- cisco-ci-domain-verification=3136c65795306e886d1b0ae0c431b84638bb487f9f5f73323e9b54bfaac1528b
- openai-domain-verification=dv-PHOTkZzMUn8EPvgSDglkiD1j
- NF89SwG4Q1U/yEG0fKf967SZXEJdGSvBzENAnh6bg2jIcKpVVRpGmKyDCHbc5HnNTuv4gymLqFzbc7kxXLi0zA==
- google-site-verification=z0Qf80EykDHoxyDofjTKGU5kg_dCUE18dtP-Be48RTc
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