Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
castleconstruction.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 06:02:45 UTC · ↺ Refresh
MX Hostnames
- castleconstruction-com.mail.protection.outlook.com
MX Priorities
- castleconstruction-com.mail.protection.outlook.com: 0
A / AAAA Records
- 54.86.81.229 ↩ nginx.c1.e.node.sfs.io
Mail Server IPs
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
- 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
SOA Record
Raw SOA
ns21.domaincontrol.com dns.jomax.net 2024011678 28800 7200 604800 600
Primary NS (mname)
ns21.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024011678
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns22.domaincontrol.com
ns21.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=10
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
⚠ Policy applies to 10% of failing messages only
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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 include:spf.protection.outlook.com -all
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