Hi,
This can't be set if using an auto-reply rule. However, we can emulate this by using an ordinary Outlook rule. To do this, please follow:
1. Go to Home tab > Rules > Manage Rules & Alerts.
2. Click New Rule button.
3. Select "Apply rule on messages I receive" and click Next.
4. Click Next button without selecting any condition. Click Yes in the pop-up dialog.
5. Select "Have server reply using a specific template". Click the blue "a specific template" to create a custom reply message. (Type your subject and message and then click Save & Close.)
6. Click Next and select "except with specific words in the recipient's address". Click the blue "Specific words" and add @whatever.com to the Search List.
7. Complete the rule setup.
Hope this helps.
Regards,
Steve Fan
TechNet Community Support