MailFrom.dev
The simple, affordable SMTP sandbox for developers
Mailfrom.dev is your sandbox SMTP server in the cloud 📨
Perfect for staging, QA, and debugging. Zero inboxes, zero spam. Catch and inspect emails your app sends, without ever hitting a real mailbox.
Simple and dev-friendly 🚀
Features
🔹 It gives you a fake SMTP server you can drop into your staging config
🔹 All emails are captured — no real ones sent
🔹 You can view everything from the UI and even download the raw .eml
🔹 No spam, no setup, no nonsense
Use Cases
1. Local Development Testing
Catch outgoing emails from your app during local development — no risk of sending real emails by accident.
2. Client Review and Demos
Share a live, read-only inbox with clients or stakeholders to show email flows without involving real users.
3. QA and Pre-Production Environments
Test complex transactional email flows (like onboarding sequences) safely before going live.
4. Team Collaboration
Provide a shared inbox for developers, testers, and product managers to review outgoing emails during feature development.
5. API and SMTP Server Validation
Quickly confirm your backend systems are correctly handling email sending logic without real inboxes.
6. Education and Training
Use in coding bootcamps or internal onboarding to teach email-based flows without dealing with real SMTP servers.
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Comments
I'm excited to share something I've been building: Mailfrom.dev – a sandbox SMTP server for testing emails in staging and dev environments. If you've ever worked on an app that sends emails, you know the pain... You want to test password resets, verifications, onboarding flows — but without actually sending emails to real users. I built this so you can drop a sandbox SMTP server right into your staging config and test safely. Sure, there are other players in the space — but most are either way too expensive or require complex setups. I wanted something affordable and dead simple to use. Just check the pricing — you'll see what I mean.
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Makers
Makers
Comments
I'm excited to share something I've been building: Mailfrom.dev – a sandbox SMTP server for testing emails in staging and dev environments. If you've ever worked on an app that sends emails, you know the pain... You want to test password resets, verifications, onboarding flows — but without actually sending emails to real users. I built this so you can drop a sandbox SMTP server right into your staging config and test safely. Sure, there are other players in the space — but most are either way too expensive or require complex setups. I wanted something affordable and dead simple to use. Just check the pricing — you'll see what I mean.
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