title: Automatically forward all email addresses on one domain to another domain
body: <p>I've had a good search on Google but can't find the answer sorry...</p>
  
  <p>We're an Australian company who use a .com address as our primary contact point. Unfortunately sometimes people email to foo@ourdomain.com.au and so the email bounces.</p>
  
  <p>I know I can manually create entries to forward the .com.au addresses to their .com equivalent, but it's not a particularly viable solution longer term.</p>
  
  <p>Is there a way to automatically do that mapping at a server level? We have root access so I can set up whatever is required in that regard.</p>
  
  <p>To re-iterate, everytime someone sends an email to:</p>
  
  <p><em>foo@ourdomain.com.au</em></p>
  
  <p>it needs to forward to</p>
  
  <p><em>foo@ourdomain.com</em></p>
  
  <p>and I'd prefer to automate the mapping as email addresses are added / removed quite regularly.</p>
  
  <p>We are also using PLESK if that makes a difference.</p>
  
  <p>Thanks...</p>