title: How to understand whether I need to put . sign or @ sign at the end of label in DNS SOA rname record?
body: <p>Is there any convention I missed while parsing SOA record RNAME field?</p>
  <p>For example amazon.com SOA rname is: root@amazon.com</p>
  <p>But when program parses it there is no <code>@</code> symbol, it is treated like regular domain label.</p>
  <p>Question is how would  I understand whether I need to put <code>.</code> sign or <code>@</code> sign at the end of label?</p>