mailcue
The premium Open Source alternative to Mailtrap
🎯 Best for:Developers needing a robust local environment for email workflow testing.
What is mailcue?
An all-in-one email testing server that captures outgoing mail for inspection without actual delivery. It supports SMTP, IMAP, and security validation protocols like DKIM and SpamAssassin in a single container.
Tech Stack
TypeScriptTesting & QA
Why mailcue?
- • Single Docker container setup
- • Integrated SpamAssassin scoring
- • GPG and IMAP support
Limitations
- • Local only by default
- • No long-term mail storage
- • Basic Web UI
3/18/2026
Last Update
0
Forks
4
Issues
MIT
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to mailcue instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Mailtrap)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%