This page will show you how to configure Apple’s Mail program
 to automatically respond to incoming email.
 
Apple Mail Out of Office Auto-reply
  1.  Go to Mail > Preferences and select “Rules”.
  2.  Click on the “Add Rule” button.
 
 
Mail
  1.  In the “Description” text field, name your new rule.
  2.  In the Drop-down menus under “If any of the following conditions are met:”, choose “Account” and then the email account to which you would like the rule to apply.
  3.  In the Drop-down menu under “Perform the following actions:”, choose “Reply to Message” then click the Reply message text...” button to insert your message.
 
  1.  Insert your message into the “Reply Message” text box.
  2.  Click “OK” when finished.
 
To turn off the auto-reply feature uncheck the box under the “Active” list next to the rule.
Note: For the new rule to work correctly you must leave your computer on with the Mail application open during your absence.
How to disable this feature upon your return.