Developer Tool
MailSandbox
Safe email testing for development teams.
A fake SMTP server that captures outbound email from staging and development environments. Inspect HTML rendering, validate headers, check spam scores, and share emails with stakeholders via signed URLs — without ever hitting a real inbox.
Highlights
- SMTP sandbox that intercepts all outgoing traffic
- Secure stakeholder sharing via signed URLs — no login needed
- HTML, CSS and header inspection tools
- Isolated inboxes per developer
- Spam score analysis