What does the SPF ? (Neutral) Qualifier do?

`? (Neutral)`: SPF Qualifier

The SPF ? qualifier (Neutral) means no opinion on whether the sender is authorised. Treated the same as no SPF record.

Published May 10, 2026 · Last verified August 7, 2026 · Maintained by TamingDNS

Type
Qualifier

Syntax

DNS Lookup
No (no extra lookup)

💬 What This Qualifier Does

The "?" qualifier produces a "Neutral" result, the equivalent of the domain having no SPF opinion on the sender. It's treated similarly to "no SPF record" and provides no enforcement. "?all" is sometimes used during initial DNS deployment or troubleshooting but should not be a permanent configuration.

When to Use This

"?all", very early SPF setup where you want to observe without any filtering
Rarely used on individual mechanisms

⚠️ Watch Out For

"?all" provides zero protection and should not remain in production.
Some spam filters treat "?all" the same as no SPF record, so it provides no benefit.

📋 Complete Example Records

Every one of these is a complete record you can paste as it stands. Try one in the SPF Checker or build your own with the SPF Builder.

v=spf1 ?all

RFC 7208 §8.2 says a neutral result MUST be treated exactly as if there were no record at all. So this is a longer way of publishing nothing.

v=spf1 include:_spf.google.com ?all

Google passes; everyone else gets no opinion. That is fine while you are observing, but a neutral result hands DMARC nothing from SPF, so every other sender has to pass on DKIM alone.