Test your real sending path
Keep your ESP, From address and finished message. Send to the run's controlled seed list rather than a customer audience.
A GlockApps alternative that shows where your email lands.
Test the campaign you actually send. MailSlurp checks inbox and spam placement across real provider accounts, with scheduled checks and APIs for your next send.
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See where each tested copy arrives.
A message can reach Gmail Promotions and Outlook spam in the same test. MailSlurp keeps those results separate so you can see which provider needs attention before the campaign goes out.
Review the result for each seed account alongside content and domain findings. Change the relevant sender or message setting, then rerun the same test to compare the outcome.
Explore inbox placement testing
Compare personal and business inboxes
Review supported Gmail, Outlook, Google Workspace and Microsoft 365 accounts. The current seed list shows the coverage included in your run.
Investigate the specific failure
Separate spam, Promotions and not-received results. Use headers, authentication and content findings to decide what to check next.
Catch 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.
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 walkthroughCheck where it lands. Then check how it looks.
Bring placement, real-client previews and message checks into one MailSlurp workflow. Review the delivered email on supported clients and devices, then audit links, images and content before approval.
Placement tells you where the email arrived. Rendering shows how it looks. Email and SMS tests can also prove that a received link or verification code completes the customer journey.
Explore campaign quality assurance
Run a one-off campaign test
Create a fresh run and follow the seed-list walkthrough before an important send.
Follow the setup guide
Schedule repeat checks
Use a supported sending connection to check placement regularly and review changes in sender history.
Set up recurring tests
Add placement to your API workflow
Create the test, send through your provider and retrieve the results alongside your existing automated checks.
See the placement APIThree 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.
Comparing inbox placement tools
Can I use MailSlurp as a GlockApps alternative?
Yes. MailSlurp combines provider inbox placement tests with scheduled checks, API automation, device previews and delivered-email audits. Start with the sender and message you want to evaluate, then review where each copy arrived in the test accounts. Explore inbox placement testing.
Does receiving a test email prove inbox placement?
An accepted send confirms that a server accepted the message. Receipt in a MailSlurp test inbox confirms that the message arrived there. Provider placement separately records the folder or tab observed in real seed accounts, including inbox, Promotions, spam or junk. A missing result needs investigation; it is not an inbox pass.
Can I keep my current email service provider?
Yes. Send through the ESP, domain and template you already use. For a manual campaign test, create a MailSlurp run, copy its current seed addresses and tracking marker, and send only to that controlled test audience. For recurring checks, use a supported sending connection or the API workflow. Read the placement setup guide.
Does a good spam score guarantee inbox delivery?
Spam scores identify message risks; provider placement records what happened to each tested copy. Review both. Gmail Promotions is a delivered category, separate from spam. Seed results describe those accounts and that send, so compare equivalent runs rather than treating one result as a guarantee for every subscriber.
Can I automate the test and share its result?
Yes. Use the dashboard for scheduled checks, or use the API to create a test, retrieve its seed addresses and marker, send through your provider, and read the provider results. Keep the report with your campaign review or automated test. MailSlurp supports report exports and share links for team review. See the automation workflow.
Check your next send with MailSlurp.
Free to start. Test one real campaign, review the provider results and find the next issue to fix.
