Email Deliverability Test
See where your email actually lands before you send it to your list. Test your inbox, spam, and promotions placement across major email providers for free, with no signup or card required.
What is an email deliverability test?
A deliverability test sends your email to seed inboxes across major providers and reports where each copy actually lands. Instead of predicting whether your message might trigger a spam filter, you see its real placement in the inbox, promotions, or spam.
Warmup Inbox tests placement across Gmail, Outlook, Yahoo, iCloud, and other major providers, so you can see how results differ between them.
What this test checks
Our report shows two things for each test:
- Email provider: see your results across Gmail, Outlook, Yahoo, iCloud, and other major providers.
- Email placement: see whether your message reached the primary inbox, promotions, or spam.
The test measures actual placement instead of predicting it from your email content.
How to run the test
- Copy the test addresses shown above and send your email to all of them.
- Paste the code into the email body before you send.
- Click Get Your Score to open your report.
Why emails land in spam or promotions
Several factors can affect where an email lands, including failed or missing SPF, DKIM, or DMARC authentication, poor sender reputation, spam-like content, and high bounce or complaint rates.
This test shows you where your email is being filtered, so you know which providers need further investigation. If sender reputation is the problem, warming up your email can build a more consistent sending history before you increase your sending volume.
Frequently asked questions
What is an email deliverability test?
An email deliverability test sends your message to seed inboxes across major providers and reports where each copy lands. It lets you check your inbox placement before sending to your real list.
Is the email deliverability test free?
Yes. You can run the test for free without signing up or entering a card.
Why do my emails go to spam?
Common causes include failed email authentication, poor sender reputation, spam-like content, and high bounce or complaint rates. Testing your placement shows which providers are filtering your messages so you know where to investigate.
How do I improve a low deliverability score?
Start by checking that SPF, DKIM, and DMARC are configured correctly. If authentication isn't the problem, review your sender reputation, list quality, bounce and complaint rates, and sending history.
Does this test affect my sender reputation?
The test sends your message to Warmup Inbox's seed inboxes rather than your real mailing list, so it stays separate from your live sends.
Which email providers does the test cover?
The test covers Gmail, Outlook, Yahoo, iCloud, and other major email providers.