title: Which values are possible for the javaMail SMTP session property mail.smtp.ssl.protocols?
body: <p>I am searching for nearly an hour so far to find a specification or list for valid values to fill this property. </p>
  
  <p>I am using the javax.mail.Session and invoke the Session.getInstance(props) to set "mail.smtp.ssl.protocols".</p>
  
  <p>I have an example in the code, i am working on: "TLSv1". I want to know, if there are more versions for TLS available or if i can leave the version out and just set it to "TLS" instead.</p>
  
  <p>The hints and links i followed on the web, were not concrete enough or were dead links. </p>
  
  <p>Where I searched yet so far:</p>
  
  <ul>
  <li><a href="https://docs.oracle.com/cd/E19159-01/819-3672/beaoz/index.html" rel="nofollow">https://docs.oracle.com/cd/E19159-01/819-3672/beaoz/index.html</a></li>
  <li>www.oracle.com/technetwork/java/javamail/faq/index.html (seems to point to a specification at Link "SMTP", but following it there is an empty page)</li>
  <li><a href="https://javamail.java.net/nonav/docs/api/javax/mail/Session.html#getInstance-java.util.Properties-" rel="nofollow">https://javamail.java.net/nonav/docs/api/javax/mail/Session.html#getInstance-java.util.Properties-</a> (mentions an appendix A for a list of properties, but i didn't find such a list, just an eBook to buy)</li>
  </ul>
  
  <p>Many links to Oracle documentation only show the Oracle landing page.
  Wikipedia description for SMTP mentions the RFC 821, but it does not contain a list of properties or a link to them.</p>
  
  <p>Thank you for help.</p>