GitHub - FujiwaraChoki/kaizen-mail: An open-source Email TUI that supports IMAP & SMTP.
An open-source Email TUI that supports IMAP & SMTP. - FujiwaraChoki/kaizen-mail
GitHub - tweedegolf/mailcrab: Email test server for development, written in Rust
github.comSaved January 15, 2026
Summary
MailCrab is an email test server for development, written entirely in Rust with Axum backend and Yew frontend.
It acts as an accept-all SMTP server on port 1025, stores emails in memory, and provides a web interface on port 1080 to view formatted mail, headers, attachments, and raw contents via API and WebSocket. Run via Docker with `docker run --rm -p 1080:1080 -p 1025:1025 marlonb/mailcrab:latest`; supports amd64/arm64, TLS, and configurable retention.
