Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dbx51.com
Disposable
✓ Yes
Unknown
⚠ Yes
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-14 18:18:03 UTC · ↺ Refresh
MX Hostnames
- mail1.smtp99.com
MX Priorities
- mail1.smtp99.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 45.56.105.37 ↩ 45-56-105-37.ip.linodeusercontent.com
SOA Record
Raw SOA
ns-156.awsdns-19.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-156.awsdns-19.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-611.awsdns-12.net
ns-1405.awsdns-47.org
ns-156.awsdns-19.com
ns-1617.awsdns-10.co.uk
SPF Record
✗ MissingNo SPF record — domain is unprotected against spoofing.
⚠ No SPF record found. Email servers cannot verify authorized senders.
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=100;rua=mailto:[email protected],mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
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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