Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rpb.biz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 16:11:15 UTC · ↺ Refresh
MX Hostnames
- rpb.biz
MX Priorities
- rpb.biz: 0
A / AAAA Records
- 199.101.48.234 ↩ northstar-composites.com
Mail Server IPs
- 199.101.48.234 ↩ northstar-composites.com
SOA Record
Raw SOA
ns1.199-101-50-7.cprapid.com managed_servers.hostrocket.com 2026031900 3600 1800 1209600 86400
Primary NS (mname)
ns1.199-101-50-7.cprapid.com
Admin Email (rname)
managed_servers@hostrocket.com
Serial
2026031900
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns1.199-101-50-7.cprapid.com
ns2.199-101-50-7.cprapid.com
SPF Record
✗ MissingNo SPF record — domain is unprotected against spoofing.
⚠ No SPF record found. Email servers cannot verify authorized senders.
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
No TXT records found.
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