title: Redirecting mail.example.com to http://mail.google.com/a/example.com
body: <p>A domain name that we have is using google mail as its backend, but its not hosted anywhere (no website). How can I, through the registrar interface (I'm using 1&amp;1), redirect ppl who type in <a href="http://mail.example.com" rel="noreferrer">http://mail.example.com</a> to <a href="http://mail.google.com/a/example.com" rel="noreferrer">http://mail.google.com/a/example.com</a> ?</p>
  
  <p>I can create a subdomain and set its DNS/CNAME, but what do I put where? Also, if I make this change will it affect the existing mail delivery (for which everything is running fine presently).</p>