Send mails with OS X's Mail.app from the terminal.
Note: The tool actually just creates the mail in Mail.app. To send it you need to use the -x option.
marc@MFMBP ~ $ mailappsend -h
Simple CLI utility to create a mail in apple mail
-s text set the subject of the mail
-c text set the content of the mail
-f path specify a file containing the content of the mail
-a path set an attachment
-t text set the recipient mail address
-x send the mail after creating it
-h print this help and exit
curl https://raw.github.com/Viehzeug/mailappsend/master/mailappsend.sh -o /usr/local/bin/mailappsend && chmod +x /usr/local/bin/mailappsend