MailCue lets you test your app's email features without sending real emails to real people.
Spins up a fake email server locally using one Docker command
Lets developers test app email features without sending messages to real people
Supports SMTP and IMAP protocols to mimic real email behavior
Includes spam filtering and email authentication checks during testing
Keeps test environments isolated so nothing leaks to production inboxes
Source: olib-ai.github.io·Verified April 2026
No integrations listed yet for MailCue.
This tool does not currently include AI features.
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This tool is best for small dev teams who build apps that send emails and need a safe way to test that without spamming real people. The big win is that you can run a full fake email server locally with one command, which saves you from accidental test emails hitting real inboxes. That said, this is a developer-only tool — if you don't have someone technical on your team who knows Docker, it won't be useful to you at all.
AI-generated training guides tailored to your team's size, skill level, and focus areas for MailCue — coming in v0.3.2.
View our roadmap →We're building a review system so business owners like you can share real experiences with MailCue.
Last researched: April 2026
