My company's mail server doesn't allow me to set up an out of office notification and I am trying to find a work around.

On my next trip I plan on leaving my laptop running - but I am not sure what program I can use to do an out of office notification. I use Outlook 2003, but it doesn't appear to allow me to set up a rule to send back a message. I have also played with Thunderbird - no luck.

Any suggestions would be appreciated.