Catch every email
before it ships.
Point your app's mailer at Sendtrap. Every email lands in a private inbox instead of a real inbox — HTML, headers, and attachments intact.
Every inbox has its own SMTP address.
Create a project, add an inbox. Sendtrap generates a unique host, port,
username and password — ready to paste into .env.
Laravel, Node.js, Django, Rails — if it speaks SMTP, it works.
- → One inbox per project, team, or environment
- → Copy credentials or grab the code snippet
- → Rotate credentials any time without touching your code
Open every message. Check everything.
HTML preview, plain text, raw RFC 822 source, headers, and attachments — all in one pane. Messages stream in over WebSockets the instant your app sends them.
- → Rendered HTML in a sandboxed iframe
- → Full header inspection — DKIM, SPF, MIME
- → Download attachments, share a public read link
Nothing new to learn.
It's plain SMTP. Use the mailer you already have. No SDK to install, no webhook config to read, no documentation to bookmark.
- → Standard SMTP AUTH on port 1025 or 2525
- → Works in CI — assert on delivery via the REST API
- → One inbox per environment, keep staging separate from dev
# swap these in; everything else stays the same
MAIL_HOST=sendtrap.dev
MAIL_PORT=1025
MAIL_USERNAME=in_lcobth6evrev
MAIL_PASSWORD=••••••••••••••
MAIL_ENCRYPTION=nullReady to stop guessing?
Create a free inbox in under a minute. No credit card required.
Get started freeNo credit card required