title: Zimbra ZCS 8.6 no dkim signature
body: <p>I made DKIM configuration as mentioned in ZCS manual by running:</p>
  
  <p><code>/opt/zimbra/libexec/zmdkimkeyutil -a -d rush.zone</code></p>
  
  <p>Tested it:</p>
  
  <p><code>/opt/zimbra/opendkim/sbin/opendkim-testkey -d rush.zone -s {Domain Selector} -x /opt/zimbra/conf/opendkim.conf</code></p>
  
  <p>No errors till now. Restarted ZCS. And still no DKIM signature header in messages nor from mail sent via Webmail, neither from SMTP.</p>
  
  <p>Let me know where should I look in to debug this issue.</p>
  
  <p>Thanks!</p>