Mailtester.ai
Check newsletter deliverability and get prioritized suggestions before sending
Diagnose email delivery issues and monitor sending performance.

Folderly is an email deliverability platform for teams that need to understand why messages miss the inbox. Its tools examine technical setup, authentication, content, domain signals, and inbox placement to help identify problems and prioritize fixes. Ongoing monitoring and alerts make it possible to follow delivery performance after a campaign starts.
The wider suite includes inbox placement testing, checks on real test messages, and AI assistance for campaign drafts. Teams can use different tools for preparing a message, reviewing sending infrastructure, and tracking delivery over time. Guidance and reporting provide a shared basis for improving email operations.
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