title: Multiple DKIM per domain
body: <p>So I have one DKIM key that I use with Google Apps. Which under the DNS TXT Record is <code>v=DKIM1;</code>;</p>
  
  <p>Now I am adding a second DKIM authentication for PHP mail.
  With this second key, do I make it <code>v=DKIM2;</code>, or do I leave it as <code>1</code>?</p>
  
  <p>Thanks</p>