Mailtrap
The easiest way to stop test emails from accidentally hitting real inboxes during development — a small, cheap, developer-friendly tool that solves one specific problem well.
What it does
Mailtrap's core product is an email sandbox: a fake SMTP/API endpoint that captures every email a staging or dev environment tries to send, so nothing leaks to real customers during testing. It also includes an HTML/CSS checker that flags email-client rendering issues, plus separate paid production email-sending and email-marketing modules.
Who this helps
You test emails from staging or development.
You don't want test emails reaching real customers.
You send transactional email through an API.
You're a developer or QA team.
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