Free email tester: inbox, spam, or promotions?
Send your campaign to our test accounts and watch where it lands in real time. It works with any email marketing service, and some of the accounts run filters including Barracuda, Mimecast, and Sophos. Created by Ajay Goel, GMass founder.
Send the test
Send your campaign to these 15 addresses.
Copy the whole list, paste it into your email platform, and send the exact campaign you want to test. Don’t change the content just for the test—the point is to see how the real message performs.
Watch the results
See where each copy lands, live.
Results appear as messages arrive. Search by sender, address, domain, subject, or ESP to isolate a specific test or campaign.
If you hit spam, here’s what to change.
The test is most useful when you act on it. Try a few campaign-level changes first; if deliverability remains weak, work on the longer-term signals that shape your sender reputation.
Quick deliverability fixes
Make a change, send another test, and see whether placement improves.
- Adjust images. Remove images, or if you’re sending with Gmail, try embedded images instead of hosted images.
- Try plain text. Send the email as plain text and try making the subject line all lowercase.
- Remove certain links. Remove the unsubscribe link and turn off open and click tracking for the test.
- Check the technical side. Use our free Email Analyzer to confirm SPF and DKIM are passing.
Build better inbox placement
Improve the signals mailbox providers use to decide whether future mail belongs in the inbox.
- Send email people want. Don’t send spam. Send email people will want to open and reply to.
- Set up a custom tracking domain. Keep your open and click tracking reputation isolated from other senders.
- Verify before sending. Use the GMass free email verifier to reduce bounces before a campaign goes out.
Spam Solver repeatedly tests deliverability while you adjust a campaign, making it much faster to identify changes that improve inbox placement.
Love the tester? See why 99% of GMass users report the best deliverability they’ve ever had.
Not seeing the deliverability numbers you want from your current cold email or email marketing platform? Learn more by taking the GMass tour, or explore our other free deliverability tools.