Server reputation diagnostics
One server—or its whole SPF estate.
Check a mail server directly, or recursively map a sender domain's SPF IPv4 ranges and run a bounded, evidence-led reputation sweep.
SPF rangesPTRFCrDNSRBLDNSBLPDF
Public DNS evidence only
Ongoing monitoring
Keep an eye on this server
Save this server for manual checks or optional hourly or daily monitoring.
Only confirmed listings count as alerts; timeouts stay inconclusive. SPF range sweeps remain one-off tests.
Saving a target does not start a scan or enable monitoring. Choose those actions in your account.
Scan running
Mapping the server
Resolving public DNS...
DiscoverCoverBlocklistsPTRPDFEmail
Scan complete
