Track spam scores over time
Compare spam scores across repeat tests and spot changes after a new template, sender or ESP. Use the test history to see whether your fixes reduced spam risk.
A GlockApps alternative for every campaign check.
Test where your email lands, investigate the provider result and review the delivered design. MailSlurp brings placement and campaign QA together.
Trusted by teams at
See where every provider puts your email.
Gmail may put a campaign in Promotions while Yahoo sends it to spam. See each account's result, then inspect content and sender-domain findings to decide what to fix before your next send.
Test your email
Analyze domain health
Check SPF, DKIM, DMARC and spam blocklists alongside inbox placement. Spot authentication problems and blocklist findings before your next campaign.
Connect your ESP directly
Connect your sending service and schedule regular placement tests. Send through your own ESP, keep your real sender and campaign content, and review the results in MailSlurp.
Watch a real placement test.
Follow a test from its seed list to the provider report. See how MailSlurp connects the email you sent with inbox and spam outcomes, then keeps the findings ready for review.
Follow the walkthroughCatch the change before your audience does.
Schedule regular tests through your sending service and catch a drop in inbox placement. Compare runs, open a sender's history and identify the provider that changed.
Run a manual check before a campaign, set up recurring tests or trigger a run through the API. Your team can review every result and investigate spam scores in the web dashboard.
Choose how you test
Example test history showing a change in inbox placement.
Personal inbox coverage
Check Yahoo, Gmail, Outlook, Proton Mail and iCloud accounts to see where your consumer campaigns and notifications land.
Professional inbox coverage
Include Google Workspace and Microsoft 365. Business filtering can produce a different result from a personal account.
Get notified on inbox placement changes
Get inbox placement change alerts in Slack or Microsoft Teams. Keep your team informed when delivery shifts so you can investigate the affected sender or provider.
Three ways to test inbox placement.
Use your real sending service and campaign content. Choose scheduled monitoring, a manual test or the API, with results in the same dashboard.
Schedule regular checks
Connect your sending service, choose your audience and set a schedule. Compare results over time to catch placement changes.
Run a manual test
Create a test, use its tracking code as the subject and send to the supplied seed addresses. Check the result before your next send.
Test through the API
Create tests and retrieve provider results from your own app or workflow. Trigger a check whenever a campaign, template or sender changes.
Compare the message, the sender and the provider sample.
Use your actual campaign and sender
Try MailSlurp with a campaign you already know. Send through the same email provider and From address you use for your audience, then inspect the result for each seed account instead of relying on one headline percentage.
Compare matching provider samples
When comparing a GlockApps result with a MailSlurp run, note which personal and business providers each test includes. Keep Promotions separate from spam and investigate missing or pending results. Follow a placement check with device previews and Email Audit before the final send. Explore MailSlurp's provider coverage and automated placement checks when planning repeat tests.
Questions before you switch?
How do I compare inbox placement before and after a campaign fix?
Keep the sending provider, From address and provider sample comparable. Send the campaign through its normal route, inspect the completed mailbox results and change one suspected problem before testing again. MailSlurp keeps provider-level outcomes and sender findings available so you can investigate a change rather than relying on a single overall score. Follow the campaign placement workflow.
Can I test a campaign from my existing ESP?
Yes. Create a placement test, use the current tracking marker and send to its seed addresses through your own provider. Review the result for each personal or business account included in that run.
Does a test guarantee inbox delivery to every subscriber?
A result shows where the tested copies arrived during that run. Use repeat checks alongside sender authentication, content and list-quality review to make a better sending decision. Keep Promotions separate from spam.
Know where your next campaign lands.
Send a test through your real provider and inspect the result.
