Mailfrom.dev – a sandbox SMTP server for email testing

Hacker News

I built Mailfrom.dev to fullfill a necessity I've had for years.. A simple, affordable sandbox SMTP server that lets you test email flows (resets, onboarding, verifications) in dev/staging environments — without sending real emails to real users and that can be shared with other people and clients. 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. Stack: Laravel, Vue 3, shadcn, hosted on k3s on Hetzner, using AWS S3 and SES. Would love your thoughts or feedback — especially if you've struggled with email testing in staging like I have.

Visit product View on Hacker NewsApr 24, 2025

Share card

Actual performance

2points

Did not reach leaderboard

Launch Intel predictions

Analyze your own launch →

Product HuntOn track for Day 1 leaderboard · Strong signals: user, email, using · Missing: mac, agents, macos

95%95% predicted probability of success on Product Hunt, based on ML models trained on real launch data.

best fitHighest predicted score across all platforms for this description.

Indie HackersFits the IH revenue-focused audience · Missing: supports, reddit linkedin, podcasting

78%78% predicted probability of success on Indie Hackers, based on ML models trained on real launch data.

TrustMRRFits verified-revenue profile · Strong signals: users, way · Missing: mobile apps, ios, personal

53%53% predicted probability of success on TrustMRR, based on ML models trained on real launch data.

Hacker NewsMay not resonate with HN audience · Strong signals: io · Missing: https docs, excited, just released

43%43% predicted probability of success on Hacker News, based on ML models trained on real launch data.

nativeThis product was originally launched on this platform.

AppSumoMay struggle as an AppSumo deal · Strong signals: host, users · Missing: plus, platform, intuitive

37%37% predicted probability of success on AppSumo, based on ML models trained on real launch data.

Acquire.comPre-revenue stage for this audience · Missing: arr, mrr, revenue

25%25% predicted probability of success on Acquire.com, based on ML models trained on real launch data.

BetaListMay not resonate with beta-testers · Missing: web3, chat, crypto

0%0% predicted probability of success on BetaList, based on ML models trained on real launch data.

Correct prediction on native model

Similar products

Jetpack – a more convenient webpack dev server59%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Jetpack – a more convenient webpack dev server

Hacker News7

Dimamo28%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Email addresses for testing

Indie Hackers1productivity

Signadot – using OpenTelemetry to do Sandbox-based testing45%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Signadot – using OpenTelemetry to do Sandbox-based testing

Hacker News7

Azure-sandbox34%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Azure-sandbox

Hacker News10

Helios OpenTelemetry Sandbox70%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Helios OpenTelemetry Sandbox

Hacker News4

ECMAScript Sandbox57%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

ECMAScript Sandbox

Hacker News1

ECMAScript Sandbox [WIP]53%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

ECMAScript Sandbox [WIP]

Hacker News2

Spacedeck Sandbox57%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Spacedeck Sandbox

Hacker News5

MailFrom.dev43%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

A sandbox SMTP for devs

Indie Hackers1b2b

Juggler.dev39%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

A/B testing tool

Indie Hackers3$7/mob2c

Browse all products Analyze your launch