SPF TempError
Temporary DNS or evaluation failure during SPF checks.
Problem summary
Temporary DNS or evaluation failure during SPF checks.
Symptoms
- Intermittent spf=temperror in headers or reports
- Lookups time out against some resolvers
- Failures correlate with DNS outages or overloaded nameservers
Possible causes
- Authoritative DNS timeouts or SERVFAIL
- Unstable include targets
- Resolver rate limits during bursts
How to diagnose
- Query the same SPF name from multiple resolvers over time
- Check SOA/NS health and include-target availability
- Separate true temperror from cached earlier failures
How to fix
- Stabilize authoritative DNS and critical include domains
- Reduce fragile deep include chains
- Retry after DNS recovery; do not “fix” SPF by publishing invalid records
How to verify
- Repeated lookups succeed without SERVFAIL
- temperror rate drops in DMARC aggregates
Prevention
- Monitor DNS availability for the org domain and SPF includes
- Avoid single points of failure in include targets
When to escalate
- Production mail is failing for a material share of recipients after remediation attempts