Enter a sending domain.
DNS check
Check whether SPF supports your sending path.
A standalone SPF lookup is planned. For now, Sendlander can still help you test whether real messages place correctly.
Planned: standalone DNS checker is not live yet.
Workflow
Simple enough to run before every important send.
Resolve and validate the SPF record.
Show the result beside placement diagnostics.
Guide
Use the result as evidence.
When to use this
SPF checker is useful for operators auditing whether the right services can send for a domain. The job is to explain SPF readiness and connect it to delivered-message evidence, using evidence that is specific to the sender and message path under test.
The main risk is publishing a record that looks right while the actual ESP uses a different return path. Sendlander keeps the workflow grounded by tying the page back to real reports, real seed results, and visible diagnostic checks instead of generic deliverability advice.
What the report should prove
The useful evidence includes SPF record presence, lookup behavior, observed SPF result, return-path domain, and alignment status. These signals help separate a broad sender problem from a provider-specific issue or a temporary pending state.
The checks to review are root TXT records, SPF syntax, included senders, lookup limits, and delivered authentication headers. The result should lead to one or two concrete fixes, not a vague list of every possible deliverability concern.
How to act on it
A practical workflow is to check DNS, send a real message, confirm the observed SPF result, then retest placement after changes settle. After each meaningful change, rerun a comparable test so the team can tell whether placement improved.
Use this page as an entry point into the product, then save the report in the dashboard when the result matters. Saved reports make follow-up tests easier to compare and keep the next fix tied to evidence.
Details
Focused answers.
Does SPF alone fix spam placement?
No. SPF is one authentication signal. Content, reputation, DKIM, DMARC, and sending behavior still matter.
Will Sendlander edit DNS records?
No. It will report findings; DNS changes stay under your control.