SPF DNS diagnostics

Fix SPF void lookups

An SPF include or redirect can point to a DNS name that returns no SPF data. Diagnose those observed void results separately from the number of SPF mechanisms that can cause DNS lookups.

Problem description

Your SPF policy refers to a dependency with no usable SPF record:

SPF dependency lookup returned NXDOMAIN or NODATA.

Check SPF dependencies free

What the check reports

Void results: current NODATA or NXDOMAIN replies on analyzed SPF dependencies.
Lookup terms: a separate conservative count of DNS-querying SPF mechanisms.
Limits: receiver handling can vary, so the result does not claim a universal SPF permerror.

Safe repair workflow

Identify the exact missing include or redirect target.
Confirm whether the sending service is still legitimate and active.
Use the provider's current SPF authorization, or remove only a retired dependency.
Preserve every other authorized sender in the single SPF record.

Reference: RFC 7208 SPF.