mailit is a wrapper to send mails including attachments from the command line. It uses sendmail to deliver the message to the corret place. mailit is based on MIME::Lite from ZeeGee Software Inc. With -p flag set it reads from standard input up to an EOF or a single dot line. That means it can read some data through a Unix Pipe till EOF or, if you prefere read in interactively, terminate input with a single dot in the line. In interactive mode mailit will prompt you for the body. The data you entered this way will be sent as the body of the mail setting text/plain as Content-Type. mailit determines the 'sender address' from both the environment variable HOME for the 'user' part as well as the source setting $DOMAIN_NAME as 'domain'.