Free deliverability tool

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.

100% free Works with any sender Real-time results
1

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.

Test addresses 15
ajaygoel999@gmail.com, test@chromecompete.com, test@ajaygoel.org, me@dropboxslideshow.com, test@wordzen.com, rajgoel8477@gmail.com, rajanderson8477@gmail.com, rajwilson8477@gmail.com, briansmith8477@gmail.com, oliviasmith8477@gmail.com, ashsmith8477@gmail.com, shellysmith8477@gmail.com, ajay@madsciencekidz.com, ajay2@ctopowered.com, ajay@arena.tec.br
Copied. Now send your campaign to these addresses from your email platform.
2

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.

Connecting
Gmail
ajaygoel999@gmail.com
10-year-old Gmail account
Waiting for matching email…
No matching emails found. Clear search
Gmail Mailbox filter
test@chromecompete.com
Google Workspace filtered by Barracuda
Waiting for matching email…
No matching emails found. Clear search
Gmail
test@ajaygoel.org
Google Workspace
Waiting for matching email…
No matching emails found. Clear search
Gmail
me@dropboxslideshow.com
Google Workspace
Waiting for matching email…
No matching emails found. Clear search
Gmail
test@wordzen.com
Google Workspace
Waiting for matching email…
No matching emails found. Clear search
Gmail
rajgoel8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
rajanderson8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
rajwilson8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
briansmith8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
oliviasmith8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
ashsmith8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
shellysmith8477@gmail.com
Gmail
Waiting for matching email…
No matching emails found. Clear search
Gmail
ajay@madsciencekidz.com
Google Workspace
Waiting for matching email…
No matching emails found. Clear search
Gmail
ajay2@ctopowered.com
Google Workspace
Waiting for matching email…
No matching emails found. Clear search
Gmail
ajay@arena.tec.br
Google Workspace
Waiting for matching email…
No matching emails found. Clear search

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.

For this campaign

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.
Longer term

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.
GMass users can automate the test → tweak → re-test loop.

Spam Solver repeatedly tests deliverability while you adjust a campaign, making it much faster to identify changes that improve inbox placement.

Learn about Spam Solver

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.

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Then use the quickstart guide to send your first campaign.