Free email auth checker
Free SPF, DKIM, DMARC, BIMI, and email auth checker
Run a free email auth checker to review SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT in one request. Use it as the fastest first-pass sender posture check before launch, migration, or incident escalation.
Primary use
Combined auth review
Check the sender stack before you decide which single-record problem deserves the next investigation.
Coverage
7 checks
Review SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT together.
Decision signal
1 health score
Use one score and one status to decide whether rollout risk is acceptable.
Best moment
Pre-launch
Most useful before migrations, campaign launches, and sender trust escalations.
Intent-led preview
SPF, DKIM, DMARC, BIMI, and email auth checker
Main action
email auth checker
What this page returns
Primary use
Check the sender stack before you decide which single-record problem deserves the next investigation.
Coverage
Review SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT together.
Decision signal
Use one score and one status to decide whether rollout risk is acceptable.
Primary use
Combined auth review
Check the sender stack before you decide which single-record problem deserves the next investigation.
Coverage
7 checks
Review SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT together.
Decision signal
1 health score
Use one score and one status to decide whether rollout risk is acceptable.
Intent overview
What teams usually need from this tool page
The strongest tool pages answer the immediate question, make the next move obvious, and connect the free check to the broader MailSlurp workflow behind it.
Primary use
Combined auth review
Check the sender stack before you decide which single-record problem deserves the next investigation.
Coverage
7 checks
Review SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT together.
Decision signal
1 health score
Use one score and one status to decide whether rollout risk is acceptable.
Best moment
Pre-launch
Most useful before migrations, campaign launches, and sender trust escalations.
Run a combined auth check
Check the full sender-auth stack for a domain
Enter the domain and optionally the active DKIM selector. The result summarizes health score, issue counts, and the status of each auth layer.
Product workflow
Take spf, dkim, dmarc, bimi, and email auth checker beyond a one-off run
Use the free tool for the fast answer. Use the product workflow when the check needs history, owners, automation, and a place in your release or sender-health process.
Saved history
Keep every important run in one shared workflow
Use spf, dkim, dmarc, bimi, and email auth checker as a repeatable checkpoint instead of relying on screenshots, scattered notes, or one person's memory.
Automation
Turn one-off checks into release and migration gates
Trigger the same verification from CI, internal tooling, or launch checklists so DNS, deliverability, and QA decisions stay consistent.
Ownership
Route failures to the right team before they become incidents
Move from ad hoc triage into shared operational visibility with alerting, escalation paths, and clearer accountability.
Next step
Move from a fast answer into a repeatable MailSlurp workflow
The free check is built for speed. The product path is where you save runs, automate verification, and give the right owner enough context to act before the next launch or incident review.
Recommended actions
Best fit
Use this when multiple trust signals may have drifted
This page is strongest when a team needs the fastest domain-wide answer before opening a deeper investigation into one specific DNS or auth layer.
- Check the sender stack before major launches
- Review auth drift after DNS or provider changes
- Shorten incident triage when multiple checks are plausible
Upgrade path
Turn a one-shot posture check into a monitored workflow
Manual combined checks are useful for fast answers. Ongoing domain monitoring is better when auth ownership spans multiple releases and teams.
- Keep auth posture visible between launches
- Route degraded or critical runs to domain owners
- Move from spot checks to repeatable sender governance
What this checks
A combined auth checker should make the next step obvious
The goal is to show whether the sender domain looks healthy overall and to point you toward the layer that deserves a deeper follow-up, not to drown you in unrelated record detail.
SPF and DKIM
Sender trust
Validate authorization and signing before relying on them in production flows.
DMARC and BIMI
Policy and brand
Review enforcement posture and brand signal readiness together.
MX and transport
Routing and TLS
See whether mail-routing and transport security records also look aligned.
Outcome
Prioritized follow-up
Use one health score and issue summary to decide which detailed checker to open next.
Operational use
Best used before launches, migrations, and sender incidents
Searchers asking for SPF, DKIM, and DMARC checks together are usually trying to answer a high-stakes question about whether the sender domain is ready or already drifting.
Pre-launch posture
Use the combined check before important campaigns or product email releases so auth gaps are visible early.
Post-migration validation
Re-run after DNS edits or provider cutovers to confirm the sender stack still looks coherent from the outside.
Incident triage
Start here when the issue may sit in more than one auth layer and you need the highest-signal first answer.
FAQ
Questions teams ask before they operationalize this workflow
What does this email auth checker include?
This email auth checker runs a combined SPF, DKIM, DMARC, BIMI, MX, MTA-STS, and TLS-RPT review so a team can see sender posture in one run instead of jumping across single-record tools.
Why is this useful if individual checkers already exist?
Single checkers are best for deep troubleshooting. This page is better when you need the first answer about overall domain posture before deciding which detail page deserves the next investigation step.
Do I need a DKIM selector?
No, but it helps. If you know the selector, include it so the DKIM result reflects the exact record you care about rather than a best-effort probe.
When should teams use a combined auth checker?
It is strongest before campaign launches, during sender migrations, and during deliverability incidents when multiple DNS trust signals may have drifted at once.