Comment by donohoe

The author of this post makes incorrect assumptions about GDPR and makes bold claims regarding his rights

  ...GDPR gives me the right to see the data a company holds about me. 
  That includes messages about me stored on their internal systems

No. It doesn't give you a right to messages about you.

The WP DPO is correct in their response. Its okay to be mistaken but the sense of entitlement here is a bit much.

(Not a lawyer, but I've implemented GDPR compliance frameworks and worked with the lawyers closely)