I haven't run across a GUI program designed to do that, but you should be able to do it through a combination of the sendmail app and cron. Sendmail should be included with your distribution. Cron lets you run a command at pre-defined intervals.
Use Kcron or Gcrontab to set up a simple cron job if you aren't familiar with it already.
Set the job to execute the following instruction where you substitute the email address and filename of your choice.
cat filename | sendmail [email protected]