title: Send mail in phpmailer using DKIM Keys
body: <p>Currents i am using phpmailer to send mail's. now how its possible to send email in phpmailer with DKIM keys</p>
  
  <p>i search in phpmailer Class file and i found the below code </p>
  
  <pre><code>    /**
       * DKIM selector.
       * @type string
       */
      public $DKIM_selector = '';
  
      /**
       * DKIM Identity.
       * Usually the email address used as the source of the email
       * @type string
       */
      public $DKIM_identity = '';
  
      /**
       * DKIM passphrase.
       * Used if your key is encrypted.
       * @type string
       */
      public $DKIM_passphrase = '';
  
      /**
       * DKIM signing domain name.
       * @example 'example.com'
       * @type string
       */
      public $DKIM_domain = '';
  
      /**
       * DKIM private key file path.
       * @type string
       */
      public $DKIM_private = '';
  </code></pre>
  
  <p>Can i know how its possible.</p>