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
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.