Send perfect email newsletters every time
Catch conversion-draining mistakes like broken links before your subscribers do.
You've been there
You hit send on your newsletter. Then you see it—a broken link. A typo in the subject line. An image that won't load. By then, thousands of subscribers have already seen your mistake.
Your safety net before you send
Send test emails to your private Maybo inbox and get instant feedback on what's broken.
We catch the errors that make you look unprofessional, so you can ship with confidence.
Broken and misconfigured links
Catch dead links and typos in URLs before they reach your audience.
Slow-loading resources
Find slow page loads that make readers bounce.
Security warnings
Catch HTTP links that trigger security warnings in modern email clients.
Image loading problems
Verify all linked images load correctly so your design doesn't break in inboxes.
How it works
Get an inbox
Sign up and get your free @maybo.email inbox
Send your test
Send your draft to your unique test inbox
Get instant feedback
We scan for common mistakes in seconds
Fix and ship
Make corrections and send to your list with confidence