PDF saving problem

Hello, I started using em Client today. I’m very happy with the program except for one small issue. I archive emails as PDF files using an external PDF program (Ashampoo PDF Pro 4), and whenever I try to archive an email using the print option, it doesn’t create an editable PDF file but rather a JPG file embedded within the PDF. This makes the PDF file unnecessarily large, and I can no longer copy text from it. I don’t have this problem with other programs like Outlook or Thunderbird (which I no longer want to use). What could be causing this?

Best regards, Daniel