1. To create an external SMTP server using SSL, run the dsconfig command.
    $ bin/dsconfig create-external-server \
      --server-name ssl.smtp.example.com \ 
      --type smtp --set server-host-name:stmp.gmail.com \
      --set server-port:465 \ 
      --set smtp-security:ssl \
      --set "user-name:my.name@example.com" \ 
      --set password:xxxxxx --set "smtp-timeout:10s"
  2. To configure an SMTP server, run the dsconfig command.
    $ bin/dsconfig set-global-configuration-prop \
      --set smtp-server:ssl.smtp.example.com

    This command adds the server to the global list of mail servers that Directory Server can use.