Mailtrap Email Sandbox
Mailtrap Email Sandbox captures email traffic from development and staging systems so teams can examine messages before they reach real recipients.
What Mailtrap Email Sandbox is
Mailtrap Email Sandbox captures email traffic from development and staging systems so teams can examine messages before they reach real recipients. It lets users inspect message content and source, check spam scores, validate headers, and review HTML support across email clients. Separate sandboxes can be organized for different environments or review servers, then grouped into projects. The Sandbox API supports automated tests, and Mailtrap lists API calls as unlimited. The service works with apps and frameworks that support SMTP, with more than 20 setup code samples. Device Previews show rendering in iOS Mail, Gmail, Outlook, and Apple Mail across mobile, desktop, and web. Teams can share sandboxes and selectively forward messages to whitelisted recipients. The free plan includes 50 test emails per month and one sandbox.
Good
- Inspects content, source, headers, and spam scores
- Separate sandboxes can be grouped into projects
- API supports automated testing
- Device previews cover mobile, desktop, and web
- Free plan includes 50 test emails monthly
Watch out
- Free plan is limited to one sandbox
- Free plan allows 50 test emails monthly
- Not designed for real email delivery
Who it suits
It suits developers, QA teams, marketers, and managers who need to review test email across environments. Teams seeking to send real email to recipients will need a separate delivery tool.
Verdict
Mailtrap Email Sandbox is focused on reviewing and automating email tests, with environment-specific sandboxes and client previews. Its free tier is limited, and it does not send messages to real recipients.
Plans and prices
From Mailtrap Email Sandbox's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 50 test emails/month · 1 user · 1 sandbox · 10 emails per sandbox · no sandbox email address |
| Basic | $17 a month | 500 test emails/month · 3 users · 1 sandbox · 50 emails per sandbox · 100 forwarded emails/mo · no chat support · $168 billed annually ($14 /month) |
| Team | $42 a month | 5,000 test emails/month · 5 users · 5 sandboxes · 200 emails per sandbox · priority support · $408 billed annually ($34 /month) |
| Business | $123 a month | 50,000 test emails/month · 50 users · 50 sandboxes · 2,000 forwarded emails/mo · no SSO · $1,188 billed annually ($99 /month) |
| Enterprise | $498 a month | Unlimited test emails · unlimited users · 300 sandboxes · SSO · priority support · $4,788 billed annually ($399 /month) |
The facts
Each one read from Mailtrap Email Sandbox's own pages, with the date it was checked.
What it does
- Account security
- The security page says Mailtrap enforces two-factor authentication for all users and supports TLS and HTTPS connections.checked 4 Oct 2026
- API and automation
- The Sandbox API supports automated testing and the product page says API calls are unlimited.checked 4 Oct 2026
- Compatibility previews
- Device Previews can render emails as they appear in iOS Mail, Gmail, Outlook, and Apple Mail across mobile, desktop, and web.checked 4 Oct 2026
- Email analysis
- Users can inspect message content and source, check spam scores, validate headers, and analyze HTML support across email clients.checked 4 Oct 2026
- Integration
- Email Sandbox works with apps or frameworks that support SMTP, and the setup page offers 20+ code samples.checked 4 Oct 2026
- Integrations
- Mailtrap lists integrations including Salesforce Email Sandbox, Heroku, Supabase, Vercel, and SDKs for languages such as Node.js, Python, PHP, Ruby, and Java.checked 4 Oct 2026
- Not for delivery
- Email Sandbox is a testing tool and is not designed to deliver emails to real email addresses.checked 4 Oct 2026
- Purpose
- Email Sandbox captures SMTP traffic from development and staging environments so teams can inspect test messages without delivering them to real recipients.checked 4 Oct 2026
- Security
- Mailtrap states that it holds ISO/IEC 27001:2022 certification and complies with GDPR.checked 4 Oct 2026
- Support
- The pricing page lists email support on Free, Basic, and Team, and email plus live chat on Business and Enterprise.checked 4 Oct 2026
- Testing workflow
- The product provides separate sandboxes for different environments or review servers and lets users group them into projects.checked 4 Oct 2026
The company
- Company and history
- Mailtrap says it was built by Railsware engineers in 2011 after a staging system accidentally sent test emails to real customers.checked 4 Oct 2026
- Team use
- The maker describes developers, QA teams, marketers, and managers as users, with shared sandboxes and selected forwarding to whitelisted recipients.checked 4 Oct 2026
Money
- Plan limits
- The Free tier includes 50 test emails per month and one sandbox; Enterprise includes unlimited test emails and 300 sandboxes.checked 4 Oct 2026
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