Free Email Tester: The Quick, Precise Deliverability Test & Spam Checker

Welcome to Inbox, Spam, or Promotions — the 100% free email tester created by Ajay Goel, GMass founder and one of the world’s leading Gmail experts! Is your email campaign destined for the inbox or the spam folder? Now you can check deliverability in advance.

With this free email tester, you’ll send your campaign from any email marketing service to a group of specific addresses — and watch your deliverability test in real time.

Our email deliverability tester is also a spam checker; some of the accounts even have popular spam filters installed like Barracuda, Mimecast, and Sophos.

Ready to test your email deliverability? Let’s go!

1. Start the Free Email Tester by Sending Your Campaign to These 16 Addresses

Copy these addresses to clipboard. Success! Now use your favorite email marketing app to send to these addresses.

2. Watch Your Deliverability Test and Spam Checker in Real Time as Your Emails Land in the Accounts Below

Fixing Your Email Campaign Based on Mail Tester Results

If the deliverability test came up “spam,” here are short-term and longer-term solutions.

Quick deliverability fixes you can try for *this* campaign

Long-term solutions are great… but we need to get this campaign into people’s inboxes. Here are some tweaks to try:

• Adjust images. Remove any images. Or, if you’re sending with Gmail, use embedded images versus hosted images.
• 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.
• Check the technical side. Use our free Email Analyzer to see if your emails are passing SPF and DKIM.

GMass users have access to our unique Spam Solver tool, the easiest way to test deliverability, tweak an email, then re-test until you’re hitting the inbox. Learn more about Spam Solver.

Longer term deliverability fixes so future emails will hit the inbox, not spam folder

You can train Google and the other email providers to (almost) always place your emails in the inbox.

• Send email people want. Don't send spam. Send email that people will want to open and reply to.
• Set up a custom tracking domain. Open and click tracking without any other sender’s reputation potentially affecting yours.
• Verify emails before you send. GMass has a free email verifier tool (yeah, we have lots of free deliverability tools). Test your list before you send to avoid bounces; they can impact deliverability.

Love Our Free Email Tester? See Why 99% of GMass Users Report the Best Deliverability They’ve Ever Had

Not seeing the deliverability numbers you want from your cold email or email marketing platform? 99% of GMass users report the best deliverability they’ve ever had.

Learn more about GMass by taking the tour — but really, the best way to see how GMass will work for you is to download the Chrome extension. It’s free to start — send up to 50 emails every day until you’re ready to upgrade.