Enable Auto reply in Outlook Express 6

To enable the automatic reply functionality in Outlook Express you must first create an out of office message, and then an out of office rule.

How to Create an Out of Office Message:

1. Start Outlook Express.
2. Click File, New, and then click Mail Message.
3. Type the message that you want to tell the persons who e-mail to you that you are changing your e-mail address (save this file as “New e-mail address”), click File, and then click Save As.
4. Enter a name for the mail message in the File name box, select the folder that you want to save the mail message in, and then click Save.
5. Close the message and proceed to the steps to create the message to tell the person that you are changing your e-mail address.

How to Create an Out of Office Rule or message saying “my e-mail address has been changed and you can mail me to the following e-mail address”:

1. Start Outlook Express.
2. On the Tools menu, point to Message Rules, and then click Mail.
3. Click New.
4. In the Select the Conditions for your rule dialog box, click to select the For All Messages check box.
5. In the Select the Actions for your rule dialog box, click to select the Reply with Message check box.
6. In the Rule Description dialog box, click Message.
7. In the Open dialog box, locate the file that you named as "New e-mail address" section, click the file, and then click Open.
8. In the Name of the Rule dialog box, name the rule, and then click OK.
9. Click OK to close the Message Rules dialog box.

For more information please visit the web link below:
http://support.microsoft.com/kb/267880