Catch every email.
Before it ships.
Mail2See intercepts every outbound email your application sends. Inspect headers, preview HTML, debug attachments — all before a single message reaches a real inbox.
MAIL_MAILER=smtp
MAIL_HOST=smtp.mail2see.dev
MAIL_PORT=587
MAIL_USERNAME=your-api-key
MAIL_PASSWORD=m2s_live_••••••••••••
MAIL_ENCRYPTION=tlsThat's all the setup you'll ever need.
Features
Everything you need to debug email
Stop guessing why emails fail. Mail2See gives you complete visibility into every message your app sends.
Catch Emails
Zero configuration needed. Point your SMTP config at us and every email is captured instantly.
Inspect Headers
View all mail headers, trace delivery paths, and debug SPF/DKIM configuration in one click.
One-Click SMTP
Paste three lines into your .env. No servers, no DNS records, no complicated setup required.
REST API
Retrieve emails programmatically. Perfect for end-to-end testing in CI/CD pipelines.
Real-time Delivery
Emails appear in milliseconds. No polling, no delays — powered by WebSockets.
Team Inboxes
Share inboxes with your team. Everyone sees the same emails, no forwarding required.
Try it liveHow it works
Up and running in 60 seconds
Configure SMTP
Add three lines to your .env and point your app at
smtp.mail2see.dev.
Send Emails
Trigger any email flow in your app — welcome emails, password resets, invoices, anything.
See Them Instantly
Every email appears in your Mail2See inbox in milliseconds, with full headers and preview.
Product
Your entire email flow, at a glance
A real-time inbox built for developers. Filter, inspect, and debug every email your app has ever sent.
Order Confirmation #1042
Hi Jane, your order is confirmed! 🎉
Thank you for your purchase. We're preparing your order and will notify you when it ships.
Pricing
Start free. Scale when ready.
No surprises. No hidden limits. Upgrade when your team needs it.
Perfect for solo projects
- 1 inbox
- 100 emails/day
- 24h retention
- API access
For professional developers
- 5 inboxes
- 10,000 emails/day
- 30-day retention
- API access
- Webhooks
- Priority support
For engineering teams
- Unlimited inboxes
- 100,000 emails/day
- 90-day retention
- API access
- Webhooks
- SSO / SAML
- Audit logs
Stop guessing.
Start seeing.
Join developers shipping confidently. Mail2See catches every email before it can surprise you in production.
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