smtp-cli

Powerful SMTP command line client

smtp-cli is a powerful SMTP command line client with a support for advanced features, such as STARTTLS, SMTP-AUTH, or IPv6 and with a scriptable message composition capabilities supporting anything from simple plain-text messages right up to building complex HTML emails with alternative plain-text part, attachments and inline images. The MIME-Type of the attachments can either be guessed automatically or alternatively set on the command line, separately for each attachment if required.