We have around 20 email accounts that all receive messages from 2 forwarding addresses set up on our Fasthosts server.  

Is there any way that we can stop the out of office assistant from replying to emails sent to these address as when a client emails one of addresses they get out of office replies if one or more of our staff members out of office is on?

Any ideas?

I am going away on holiday and would like to send an automated email when someone sends me an email,as you do on outlook with the office assistant,you can set up a automatic message which is sent out when you receive an email.