Unimail Client is a free, open-source command-line application for sending emails through the Unimail service. Built with Go, it uses the Unimail Go SDK to handle email delivery requests. Users can send plain-text messages or formatted HTML emails directly from a terminal. The application supports multiple recipients, carbon copies, blind carbon copies, and file attachments. API authentication can be configured through an environment variable or supplied with a command-line option. Routing...