Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
crbbuilders.com.au
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 09:15:56 UTC · ↺ Refresh
MX Hostnames
- crbbuilders-com-au.mail.protection.outlook.com
MX Priorities
- crbbuilders-com-au.mail.protection.outlook.com: 0
A / AAAA Records
- 202.131.88.139 ↩ alpha.jkb.com.au
Mail Server IPs
- 52.101.151.0 ↩ mail-meupr01cu00200.inbound.protection.outlook.com
- 52.101.149.0 ↩ mail-sy2pr01cu00300.inbound.protection.outlook.com
- 52.101.149.2 ↩ mail-sy5pr01cu00902.inbound.protection.outlook.com
- 52.101.151.5 ↩ mail-meupr01cu00305.inbound.protection.outlook.com
- 2a01:111:f403:cc31::1 ↩ mail-sy8pr01cu00101.inbound.protection.outlook.com
- 2a01:111:f403:cc33:: ↩ mail-meupr01cu00200.inbound.protection.outlook.com
- 2a01:111:f403:cc31::2 ↩ mail-sy5pr01cu00902.inbound.protection.outlook.com
- 2a01:111:f403:cc31::3 ↩ mail-sy2pr01cu00503.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.islandhosting.com.au jacob.islandhosting.com.au 2026033001 3600 1800 1209600 86400
Primary NS (mname)
ns1.islandhosting.com.au
Admin Email (rname)
jacob@islandhosting.com.au
Serial
2026033001
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.islandhosting.com.au
ns1.islandhosting.com.au
SPF Record
✓ Strict (-all)
v=spf1 ip4:202.131.88.139 +a +mx include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;rua=mailto:[email protected];ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._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
2 records- SPFv=spf1 ip4:202.131.88.139 +a +mx include:spf.protection.outlook.com -all
- MS=ms86215763
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