Guide
How to investigate a broken SPF record
A practical playbook for finding the failure, understanding its impact, determining the right fix, and verifying the result.
The situation
Email authentication can fail because an SPF record is missing, malformed, incomplete, or no longer reflects the systems sending mail for the domain. When SPF fails, receiving mail servers may reject or flag messages — often without any immediate warning to the sender.
Before you begin
For agencies: If you're managing infrastructure for a client, confirm who has authority to approve DNS changes before proceeding. A proposed change should be reviewed before it is applied.
The operational path
The goal isn't just to find the error. The goal is to move from detection to a verified infrastructure state.
What could have caused this?
Cause
What changed
Possible impact
New sending platform added
New service was not authorized in SPF
Authentication failure for that sender
DNS record modified
SPF record was changed incorrectly
Sending disruption across the domain
Record too long
Too many DNS lookups (over 10)
SPF evaluation failure — permerror
Old provider not removed
Decommissioned sender still in record
Unnecessary exposure, potential spoofing risk
Typo or syntax error
Malformed record value
SPF parse failure — treated as missing
Step by step
Start by confirming the SPF record exists and understanding its current state. Don't assume the record is wrong — first establish what it actually says.
What to check
Expected result: You should now know whether the record exists, whether it is syntactically valid, and whether it is likely to be evaluated correctly by receiving servers.
With Infraova
Infraova continuously monitors SPF record state and surfaces meaningful changes — including syntax problems, lookup count violations, and policy changes — without requiring someone to check manually.
Once you know what the record says, determine why it is failing. The most common cause is that the record does not include all the systems legitimately sending mail for the domain.
What to check
Expected result: You should now know the gap — which sending service is not authorized, or what changed to break the existing authorization.
Do not change the record just because it looks wrong. First confirm which systems are legitimately sending mail for the domain, then determine the smallest change that resolves the failure without introducing new problems.
What to check
With Infraova
Infraova generates the exact proposed SPF record value — not a generic recommendation. The proposal includes the specific change, the reason it is needed, and the expected outcome before your team reviews it.
A DNS change is not reversible instantly. Review the proposed record carefully before applying it — especially in environments where email is business-critical.
What to check
Expected result: The review step is where the human decision happens. Infraova proposes — your team authorizes.
Once the proposed record has been reviewed and approved, apply it through the DNS provider. The method depends on whether you are working manually or through Infraova's connected provider workflow.
What to check
With Infraova
When a DNS provider is connected, Infraova executes the approved change directly through the provider API. The execution is recorded with the approving actor, the timestamp, and the exact change made.
A change is not complete when it is submitted. It is complete when the live infrastructure reflects the expected state and authentication is passing.
What to check
Expected result: The record is live, authentication is passing, and the change is documented. The operational loop is complete.
You decide. Infraova executes.
Infraova can propose and execute an approved infrastructure change, but it does not independently decide to modify client infrastructure. Every proposed change requires explicit authorization before execution.
Key takeaway
SPF failures are almost always caused by a gap between the systems sending mail and the systems the record authorizes. Find the gap, propose the smallest fix that resolves it, get the right approval, apply it, and verify the live result.
Turn this playbook into a continuous workflow
Without Infraova
With Infraova
The guide teaches you how to solve the problem once. Infraova keeps watching for it after you're done.
Continue the playbook
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Stop discovering infrastructure problems manually.
Infraova continuously monitors your client and business infrastructure, identifies meaningful problems, proposes the next action, executes approved changes, and verifies the result.